CD Manufacturing Dates

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This is an approximate and incomplete list of dates that CDs were manufactured. If you can fill in some of the missing information, or correct mistakes, please do so!

The Name, Application, and Nickname are mostly from N.R. Woodward's "The Glass Insulator in America" Reports. The Start Date and End Date have three notations -- ">" and "<" which indicate that the date was, respectively, after or before the year given, and "~" which indicates approximately. The References state where this information came from, and Comments provides some additional information to help in the dating. The Assigned Date and Comments show when the CD was originally assigned (again, note that this is approximate).

CD Name Application Nickname Start Date End Date References Comments Assigned Date Assigned Comments
CD 100   Electric Fence   1945~ 1955~   Unique to SURGE (1940-1978) 1967 The Glass Insulator in America 1967 Report
CD 100.2   Electric Fence   1945~ 1955~   Unique to SURGE (1940-1978) 1976 Millhollands Most About Glass Insulators Bicentennial Edition
CD 100.5 "J" Carrier Midspan Transposition   1924> 1941<   Unique to PYREX (1924-1941) 1973 The Glass Insulator A Comprehensive Reference
CD 100.6       1870> 1967<   Unique to HEMINGRAY (1865-1970) 1979 1979 Milholland's Suggested Insulator Price Guide
CD 101 Pony Telephone   1903> 1921<   Unique to BROOKFIELD (1869-1921). Embossing BROOKFIELD only. 1973 The Glass Insulator A Comprehensive Reference
CD 102 Pony Telephone Pony 1878   Per N.R. Woodward on Hemingray   1967 The Glass Insulator in America 1967 Report
CD 102.3   Telephone   1890 1897   NO NAME or K.C.G.W. (1890-1897). NO NAME of KCGW origin per McDougalds. 1973 The Glass Insulator A Comprehensive Reference
CD 102.4   Telephone   1883> 1899<   Unique to NEW ENG.TEL.& TEL.CO. Manufactured by an unknown New England manufacturer according to McDougalds. 1976 Millhollands Most About Glass Insulators Bicentennial Edition
CD 102.7               1979 1979 Milholland's Suggested Insulator Price Guide. No other reference. Re-assigned to CD 140.5
CD 103 Pony Telephone         NO NAME B or GAYNER (1920-1923) 1967 The Glass Insulator in America 1967 Report
CD 103.4   Telephone         Unique to NO EMBOSSING 1976 Millhollands Most About Glass Insulators Bicentennial Edition
CD 104 National Pony Telephone   1912< 1912> Brookfield 1912 Catalog   1967 The Glass Insulator in America 1967 Report
CD 105   Telephone   1883 1886   NO EMBOSSING or AM.INSULATOR CO. (1883-1886). NO EMBOSSING an American product per McDougalds. 1973 The Glass Insulator A Comprehensive Reference
CD 106 Pony Telephone Pony 1900 1955 Per N.R. Woodward on Hemingray   1967 The Glass Insulator in America 1967 Report
CD 106.1 Pony Telephone   1885 1895   Unique to DUQUESNE 1988 The Glass Insulator in America 1988 Report
CD 106.2   Telephone         Unique to P.S.S.A. 1976 Millhollands Most About Glass Insulators Bicentennial Edition
CD 106.3   Telephone   1885 1895   DUQUESNE or NO EMBOSSING. NO EMBOSSING a Duquesne product. 1976 Millhollands Most About Glass Insulators Bicentennial Edition
CD 106.4   Telephone         Unique to NO EMBOSSING - MEXICO 1969 Originally CD 406. The Glass Insulator in America 1969 Report
CD 106.5   Telephone   1940 1959   Unique to CRISOL TEXCOCO 1988 The Glass Insulator in America 1988 Report
CD 107 Pony Telephone   1924> 1969<   Start date based on ¸ marking end date based on Armstrong marking. All others fall within range. 1967 The Glass Insulator in America 1967 Report
CD 107.2   Telephone         Unique to NO EMBOSSING 1976 Millhollands Most About Glass Insulators Bicentennial Edition. Not listed in 1979 Price Guide
CD 108 Pony Telephone           1969 The Glass Insulator in America 1969 Report
CD 109 Fiske & Mott Pony Telephone Teardrop Pony or Chicago Teardrop Pony 1893 1894   Unique to CHICAGO INSULATING CO. (1893-1894) 1973 The Glass Insulator A Comprehensive Reference (listed as CD 105 probably a typo)
CD 109.5 Harloe's Patent Telephone Claw 1902 1906   Unique to HARLOE » (1902-1906) 1969 Originally CD 409. The Glass Insulator in America 1969 Report
CD 109.7     Johnson & Watson 1908     Unique to JOHNSON & WATSON Pat'd 1908 1976 Millhollands Most About Glass Insulators Bicentennial Edition. Not listed in Woodward's 1988 Report
CD 109.9     Ram's Head       Unique to PAT APP FOR 1976? Millhollands Most About Glass Insulators Bicentennial Edition. Listed in 1979 and 1995 Price Guides
CD 110 Pony External Thread Telephone Spiral Groove or Screw Top 1907 1921<   Unique to BROOKFIELD (1869-1921) Pat'd 1907 1967 The Glass Insulator in America 1967 Report
CD 110.5   Telephone Corkscrew or Screw Top 1884 1886   Unique to NATIONAL INSULATOR CO. (1884-1886) 1973 The Glass Insulator A Comprehensive Reference
CD 110.6   Telephone Corkscrew or Screw Top 1884 1886   Unique to NATIONAL INSULATOR CO. (1884-1886) 1976 Millhollands Most About Glass Insulators Bicentennial Edition
CD 111 Carrier Telephone   1926 1941< Start date based on McDougalds. Unique to PYREX (1924-1941). 1976 Millhollands Most About Glass Insulators Bicentennial Edition
CD 112 Pony Double Groove Telephone Keg or Exchange 1886>   1912< Brookfield 1912 Catalog Start date based on origin of transposition theory. 1967 The Glass Insulator in America 1967 Report
CD 112.4   Telephone Exchange 1890> 1933<   Based on ???? 1973 The Glass Insulator A Comprehensive Reference
CD 112.5   Telephone Exchange     McDougald's 2003 combined w/CD 112.4 NO EMBOSSING or NO NAME Canadians 1976 Millhollands Most About Glass Insulators Bicentennial Edition. Not listed in Woodward's 1988 Report
CD 113 Pony Double Groove Telephone Keg or Exchange 1886>     Start date based on origin of transposition theory. 1967 The Glass Insulator in America 1967 Report
CD 113.2   Telephone Exchange 1885 1895   DUQUESNE or NO NAME 1976 Millhollands Most About Glass Insulators Bicentennial Edition
CD 113.4     Exchange         1979 1979 Milholland's Suggested Insulator Price Guide. No other reference. Probably foreign -- CTRG in Milholland's 1976
CD 114 Pony Double Groover Telephone Keg or Exchange 1886> 1920~   Unique to HEMINGRAY (1865-1970). Start date based on origin of transposition theory. 1967 The Glass Insulator in America 1967 Report
CD 114.2   Telephone Exchange 1893 1894   Unique to STANDARD GLASS INSULATOR CO. (1893-1894) 1976 Millhollands Most About Glass Insulators Bicentennial Edition
CD 115 Exchange Telephone Exchange 1886>   1912< Brookfield 1912 Catalog Start date based on origin of transposition theory. 1967 The Glass Insulator in America 1967 Report
CD 115.1   Telephone   1886>     Unique to NO EMBOSSING. Start date based on origin of transposition theory. 1988 The Glass Insulator in America 1988 Report
CD 116 Large Double Groove Telephone Three Rumple 1886>   1912< Brookfield 1912 Catalog Start date based on origin of transposition theory. 1967 The Glass Insulator in America 1967 Report
CD 116.5 Double Groove     1903> 1921<   Unique to B 1973 The Glass Insulator A Comprehensive Reference
CD 117 Twisted Pair Telephone   1886>   1912< Brookfield 1912 Catalog Unique to NO NAME. Start date based on origin of transposition theory. 1967 The Glass Insulator in America 1967 Report
CD 118   Telephone   1928> 1969<   Unique to NO EMBOSSING. Hemingray dump item start date based on use of carnival. 1973 The Glass Insulator A Comprehensive Reference
CD 119 O'Brien Patent Telephone O'Brien 1885 1903< Brookfield 1912 Catalog Unique to BROOKFIELD (1869-1921) (Pat'd 1885). End based on use of "W" in embossing. 1967 The Glass Insulator in America 1967 Report
CD 120 Pony Telephone           1969 The Glass Insulator in America 1969 Report
CD 120.2 Pony Telephone         PAT APP FOR or PONY 1973 The Glass Insulator A Comprehensive Reference. Combined with CD 120 in 2003 McDougald's Price Guide.
CD 121 Toll Telephone Toll 1912< 1912> Brookfield 1912 Catalog   1967 The Glass Insulator in America 1967 Report
CD 121.4 American Union Telegraph   1871> 1893<   Unique to A.U. all have Pat'd 1871. End date based on absence of May 2 1893 patent date. 1973 The Glass Insulator A Comprehensive Reference
CD 122 Toll Telephone Toll         1967 The Glass Insulator in America 1967 Report
CD 122.4 CW Carrier Telephone         PYREX (1924-1941) or HEMINGRAY (1865-1970) 1973 The Glass Insulator A Comprehensive Reference
CD 123   Telegraph   1870 1880   Unique to E.C.& M.CO. (1870-1880) 1969 The Glass Insulator in America 1969 Report
CD 123.2   Telegraph   1870 1879<   Unique to CHESTER (1855-1879) (Pat'd 1870 date) 1988 The Glass Insulator in America 1988 Report
CD 124 National Pony Telephone           1967 The Glass Insulator in America 1967 Report
CD 124.1                
CD 124.2   Telephone   1871>     Unique to PATENT - DEC. 19 1871 1973 The Glass Insulator A Comprehensive Reference
CD 124.3   Telephone   1871>     Unique to PATENT - DEC. 19 1871 1973 The Glass Insulator A Comprehensive Reference
CD 124.5   Lightning Rod Wing Chambers 1877>     Unique to CHAMBERS Pat'd 1877 1973 The Glass Insulator A Comprehensive Reference
CD 125 Western Union Telegraph           1967 The Glass Insulator in America 1967 Report
CD 126 Western Union Telegraph Blob Top 1912< 1912> Brookfield 1912 Catalog   1967 The Glass Insulator in America 1967 Report
CD 126.1   Telegraph   1870> 1882<   Unique to BROOKFIELD (1869-1921) (Pat'd 1870 date). End date based on all embossings with 55 FULTON ST. 1979 1979 Milholland's Suggested Insulator Price Guide
CD 126.3 American Union Telegraph         BROOKFIELD (1869-1921) A.U. or NO NAME 1969 Originally CD 427? The Glass Insulator in America 1969 Report
CD 126.4 Western Union Telegraph         AM.INSULATOR CO. (1883-1886) or W.E.MFG.CO. 1969 Originally CD 426. The Glass Insulator in America 1969 Report
CD 127 Western Union Telegraph           1969 The Glass Insulator in America 1969 Report
CD 127.4   Telegraph         PATENT - DEC. 19 1871 or NO EMBOSSING 1976 Millhollands Most About Glass Insulators Bicentennial Edition
CD 127.6               1979 1979 Milholland's Suggested Insulator Price Guide listed as a Boston. Also in Millhollands. Dropped in favor of CD 143.6.
CD 128 CS Carrier Telephone           1967 The Glass Insulator in America 1967 Report
CD 128.4 Carrier Telephone Big Mouth 1933 1967<   Unique to HEMINGRAY (1865-1970). Start date based on use of mold number 1969 Originally CD 428. The Glass Insulator in America 1969 Report
CD 129 TS Carrier Telephone   1933> 1975<   Start date based on use of mold numbers by Hemingray end date based on Kerr production. All other embossings fall in this range. 1967 The Glass Insulator in America 1967 Report
CD 130   Telegraph   1877> 1908<   Unique to CAL.ELEC.WORKS (1877-1908) 1969 The Glass Insulator in America 1969 Report
CD 130.1   Telegraph   1877> 1908<   Unique to CAL.ELEC.WORKS (1877-1908) 1973 The Glass Insulator A Comprehensive Reference. Not listed in Woodward's 1988 Report
CD 130.2     Seilers 1877     Unique to SEILERS Pat'd 1877 probably made by Hemingray 1979 1979 Milholland's Suggested Insulator Price Guide
CD 131   Telegraph   1865> 1890<   Dates based on Brookfield embossings. NO NAME insulators ignored. 1967 The Glass Insulator in America 1967 Report
CD 131.4   Telegraph   1875<     Start date based on manufacture by Tillotson 1969 Originally CD 431. The Glass Insulator in America 1969 Report
CD 131.8   Telegraph         Unique to NO EMBOSSING 1976 Millhollands Most About Glass Insulators Bicentennial Edition. Not listed in 1979 Price Guide
CD 132   Telegraph Bullet         1969 The Glass Insulator in America 1969 Report
CD 132.2   Telegraph         PAISLEY or NO NAME 1976 Millhollands Most About Glass Insulators Bicentennial Edition
CD 132.4   Lightning Rod Chambers Companion 1877     Unique to PATENT - DEC. 19 1871 Pat'd 1877 1973 The Glass Insulator A Comprehensive Reference
CD 133 Regular Telegraph Telephone Bullet 1912< 1912> Brookfield 1912 Catalog   1967 The Glass Insulator in America 1967 Report
CD 133.1       1897   Included in 1897 Electrical Appliance Catalog   1990 Insulators A History and Guide to North American Glass Pintype Insulators
CD 133.2   Telegraph           1973 The Glass Insulator A Comprehensive Reference
CD 133.3   Telegraph           1976 Millhollands Most About Glass Insulators Bicentennial Edition
CD 133.4   Telegraph Bullet         1969 Millhollands Most About Glass Insulators Bicentennial Edition
CD 133.5             Unique to TEL.FED.MEX 1990 Insulators A History and Guide to North American Glass Pintype Insulators
CD 134 Deep Groove     1912< 1912> Brookfield 1912 Catalog   1967 The Glass Insulator in America 1967 Report
CD 134.4   Secondary         Unique to NO EMBOSSING 1976 Millhollands Most About Glass Insulators Bicentennial Edition
CD 134.6 Philadelphia   Mad Hatter 1896 1921<   Unique to BROOKFIELD (1869-1921) Pat'd 1896 1976 Millhollands Most About Glass Insulators Bicentennial Edition
CD 135 Fiske & Mott Regular   Chicago Diamond Groove 1893 1894   Unique to CHICAGO INSULATING CO. (1893-1894) 1969 The Glass Insulator in America 1969 Report
CD 135.5   Telegraph   1861>     Unique to ERW 1973 The Glass Insulator A Comprehensive Reference
CD 136 B&O Telegraph   1869> 1921<   BROOKFIELD (1869-1921) or B & O 1969 The Glass Insulator in America 1969 Report
CD 136.4   Telegraph Canadian Boston       NO EMBOSSING or NO NAME 1976 Millhollands Most About Glass Insulators Bicentennial Edition
CD 136.5       1871 1877   Unique to BOSTON BOTTLE WORKS (1871-1877) 1990 Insulators A History and Guide to North American Glass Pintype Insulators
CD 136.7   Telegraph         PATENT - OTHER (1880-1881) or NO EMBOSSING 1976 Millhollands Most About Glass Insulators Bicentennial Edition
CD 137   Secondary   1870> 1967<   Unique to HEMINGRAY (1865-1970) 1967 The Glass Insulator in America 1967 Report
CD 137.4               1979 1979 Milholland's Suggested Insulator Price Guide. Not in McDougald's. Deleted as a fake.
CD 137.5             Unique to NO EMBOSSING 1976 Millhollands Most About Glass Insulators Bicentennial Edition
CD 138 Postal Telegraph     1869> 1921<   Unique to BROOKFIELD (1869-1921) 1967 The Glass Insulator in America 1967 Report
CD 138.2   Telegraph           1976 Millhollands Most About Glass Insulators Bicentennial Edition
CD 138.9     Twin Pin         1976 Millhollands Most About Glass Insulators Bicentennial Edition
CD 139 Combination Safety   Combination Safety 1903 1912> Brookfield 1912 Catalog Unique to COMBINATION SAFETY Pat'd 1903 1967 The Glass Insulator in America 1967 Report
CD 139.6   Secondary   1924> 1941<   Unique to PYREX (1924-1941) 1976 Millhollands Most About Glass Insulators Bicentennial Edition. Not listed in Woodward's 1988 Report
CD 139.8             Unique to NO EMBOSSING 1976 Millhollands Most About Glass Insulators Bicentennial Edition. Not listed in Woodward's 1988 Report
CD 139.9 USLD     1925 1930   Unique to M„LAUGHLIN (1925-1935) 1969 Originally CD 439. The Glass Insulator in America 1969 Report
CD 140 Jumbo Feeder Cable Jumbo         1967 The Glass Insulator in America 1967 Report
CD 140.5     Cobalt Blob       Unique to NO NAME 1976 Previously CD 102.7 Millhollands Most About Glass Insulators Bicentennial Edition. Not listed in 1979 Price Guide
CD 141   Telephone Hot Cross Bun or Crosstop       Unique to NO EMBOSSING 1969 The Glass Insulator in America 1969 Report
CD 141.5             Unique to NO EMBOSSING 1995 1995 Price Guide for Insulators
CD 141.6     Blackburn 1893     Unique to PATENT - OTHER Pat'd 1893 1990 Insulators A History and Guide to North American Glass Pintype Insulators
CD 141.7     Twiggs 1905     Unique to TWIGGS Pat'd 1905 1988 The Glass Insulator in America 1988 Report
CD 141.8     Buzby 1890     Unique to BUZBY Pat'd 1890 1976 Originally CD 109.9. Millhollands Most About Glass Insulators Bicentennial Edition. Not listed in 1979 Report
CD 141.9     Emmingers 1872     Unique to EMMINGER Pat'd 1872 1976 Millhollands Most About Glass Insulators Bicentennial Edition
CD 142 W.U. Iridized Telegraph   1939     HEMINGRAY (1865-1970) or NO NAME Pat'd 1939 1967 The Glass Insulator in America 1967 Report
CD 142.4   Telegraph   1939     NO NAME or NO EMBOSSING Pat'd 1939 1976 Millhollands Most About Glass Insulators Bicentennial Edition
CD 143 Dwight Pattern Telegraph           1969 The Glass Insulator in America 1969 Report
CD 143.4   Telegraph   1883 1886 McDougald's states that both manufactured at similar time. AM.INSULATOR CO. (1883-1886) or BROOKFIELD (1869-1921). 1976 Millhollands Most About Glass Insulators Bicentennial Edition
CD 143.5       1883 1892   Unique to T-H.E.CO. (1883-1892) 1973 The Glass Insulator A Comprehensive Reference
CD 143.6   Telegraph   1871 1877   Unique to BOSTON BOTTLE WORKS (1871-1877) 1976 Millhollands Most About Glass Insulators Bicentennial Edition. Not listed in Woodward's 1988 Report
CD 144 Foree Bain Patent   Foree Bain 1890     Pat'd 1890 Patent assigned to Hemingray 1901 1969 The Glass Insulator in America 1969 Report
CD 144.5     Beehive 1890>     Unique to PATENT - OTHER (1890 Date) 1973 The Glass Insulator A Comprehensive Reference
CD 145   Telegraph   1912< 1912> Brookfield 1912 Catalog   1967 The Glass Insulator in America 1967 Report
CD 145.5                
CD 145.6   Telegraph         BOSTON BOTTLE WORKS (1871-1877) or NO EMBOSSING 1973 The Glass Insulator A Comprehensive Reference
CD 146   Telegraph       Woodward's 1967 Unnamed unit   Never Officially Assigned
CD 146.4             Unique to NO EMBOSSING 1988 The Glass Insulator in America 1988 Report
CD 146.5             NO NAME or NO EMBOSSING 1976 Millhollands Most About Glass Insulators Bicentennial Edition. Not listed in 1979 Price Guide
CD 147 Barclay Patent Telegraph Spiral Groove or Screw Top 1907   1912> Brookfield 1912 Catalog Pat'd 1907 1967 The Glass Insulator in America 1967 Report
CD 148                 2003 Price Guide
CD 149 Burbrook   Burbrook       BROOKFIELD (1869-1921) or NO EMBOSSING 1969 The Glass Insulator in America 1969 Report
CD 150 Deep Groove DP External Thread   Spiral Groove or Barclay or Screw Top 1907   1912> Brookfield 1912 Catalog BROOKFIELD (1869-1921) or BARCLAY Pat'd 1907 1967 The Glass Insulator in America 1967 Report
CD 151 ell Double Petticoat Telegraph           1967 The Glass Insulator in America 1967 Report
CD 152 New Western Union Telegraph & Telephone Hoopskirt 1912< 1912> Brookfield 1912 Catalog   1967 The Glass Insulator in America 1967 Report
CD 152.2                
CD 153   Telegraph & Telephone           1967 The Glass Insulator in America 1967 Report
CD 154 Double Petticoat Telegraph & Telephone   1922 1967< Per N.R. Woodward on Hemingray   1967 The Glass Insulator in America 1967 Report
CD 154.3                
CD 154.5   Telegraph         DERFLINGHER or NO NAME - MEXICO 1969 Originally CD 454. The Glass Insulator in America 1969 Report
CD 154.7                
CD 155   Telegraph & Telephone   1938 1967< Per N.R. Woodward on Hemingray   1967 The Glass Insulator in America 1967 Report
CD 155.6       1870> 1967<   Unique to HEMINGRAY (1865-1970) 1976 Millhollands Most About Glass Insulators Bicentennial Edition. Not listed in Woodward's 1988 Report
CD 156   Telegraph           1969 The Glass Insulator in America 1969 Report
CD 156.1   Telegraph           1976 Millhollands Most About Glass Insulators Bicentennial Edition
CD 156.2   Telegraph         PATENT - OTHER or NO EMBOSSING 1976 Millhollands Most About Glass Insulators Bicentennial Edition. Not listed in 1979 Price Guide OR Woodward's 1988 Report
CD 157   Telegraph Teepee       BROOKFIELD (1869-1921) or HEMINGRAY (1865-1970) 1969 The Glass Insulator in America 1969 Report
CD 157.5   Telegraph   1893 1894   Unique to STANDARD (1893-1894) 1976 Millhollands Most About Glass Insulators Bicentennial Edition
CD 158   Telegraph           1976 Millhollands Most About Glass Insulators Bicentennial Edition
CD 158.1   Telegraph   1871     CHESTER (1871-1877) or NO EMBOSSING Pat'd 1871 1988 The Glass Insulator in America 1988 Report
CD 158.2   Telegraph         BOSTON BOTTLE WORKS (1871-1877) or NO EMBOSSING 1973 The Glass Insulator A Comprehensive Reference
CD 158.9   Telegraph Screw Top Boston 1871 1877   Unique to BOSTON BOTTLE WORKS (1871-1877) 1973 The Glass Insulator A Comprehensive Reference
CD 159   Telegraph Gregory 1903     Unique to GREGORY Pat'd 1903 1976 Millhollands Most About Glass Insulators Bicentennial Edition
CD 160 Double Petticoat Pony Telephone Baby Signal 1889 1957~     1967 The Glass Insulator in America 1967 Report
CD 160.4                
CD 160.6   Telephone Pilgram Hat 1885> 1915<   Unique to AM.TEL.& TEL.CO. (1885-1915) 1973 The Glass Insulator A Comprehensive Reference. Listed in Milholland's Bicentennial and 1979 Price Guide as CD 160.5.
CD 160.7     Ice Cream Cone or Snow Cone 1883 1886   Unique to AM.INSULATOR CO. (1883-1886) 1971 Originally CD 461. Insulators With Embossing Errors
CD 161   Secondary         STAR ¥ or CALIFORNIA (1912-1916) 1969 The Glass Insulator in America 1969 Report
CD 161.2   Secondary   1869> 1921<   Unique to BROOKFIELD (1869-1921) 1976 Millhollands Most About Glass Insulators Bicentennial Edition
CD 162 Deep Groove Double Petticoat Secondary Signal 1890~ 1942 Per N.R. Woodward on Hemingray Started in the late 1880s 1967 The Glass Insulator in America 1967 Report
CD 162.05               1979 1979 Milholland's Suggested Insulator Price Guide. Not in McDougald's
CD 162.1   Secondary         STAR ¥ or BROOKFIELD (1869-1921) 1976 Millhollands Most About Glass Insulators Bicentennial Edition
CD 162.2               1979 1979 Milholland's Suggested Insulator Price Guide. Not in McDougald's
CD 162.3   Secondary         STAR ¥ or BROOKFIELD (1869-1921) 1976 Millhollands Most About Glass Insulators Bicentennial Edition
CD 162.4   Secondary         NO NAME or NO EMBOSSING Canadians 1973 The Glass Insulator A Comprehensive Reference
CD 162.5 P.R.R. Telegraph         P.L.W. or P.R.R. 1969 Originally CD 462. The Glass Insulator in America 1969 Report
CD 162.6               1979 1979 Milholland's Suggested Insulator Price Guide. Not in McDougald's
CD 162.7   Telegraph         Various Mexican only 1976 Millhollands Most About Glass Insulators Bicentennial Edition
CD 163   Secondary           1967 The Glass Insulator in America 1967 Report
CD 163.2   Secondary         Unique to NO NAME 1988 The Glass Insulator in America 1988 Report
CD 163.4             Unique to WHITALL TATUM ¸ (1922-1946) 1999 1999 Price Guide
CD 164 Extra Deep Groove DP Secondary   1912< 1912> Brookfield 1912 Catalog   1967 The Glass Insulator in America 1967 Report
CD 164.4   Secondary   1920 1930   Unique to NO EMBOSSING (FRY 1920-1930) 1973 The Glass Insulator A Comprehensive Reference
CD 165   Secondary   1870> 1967<   Unique to HEMINGRAY (1865-1970) 1967 The Glass Insulator in America 1967 Report
CD 165.1   Secondary   1922> 1946<   Unique to WHITALL TATUM ¸ (1922-1946) 1973 The Glass Insulator A Comprehensive Reference
CD 166   Secondary   1912 1916   Unique to CALIFORNIA (1912-1916) 1969 The Glass Insulator in America 1969 Report
CD 166.2   Secondary         E.L.CO. (1890-1910) or NO EMBOSSING 1973 The Glass Insulator A Comprehensive Reference
CD 167   Secondary   1946   Per N.R. Woodward on Whitall Tatum ARMSTRONG Á (1946-1969) or NO NAME 1967 The Glass Insulator in America 1967 Report
CD 168   Secondary         WHITALL TATUM ¸ (1922-1946) or HEMINGRAY (1865-1970) 1967 The Glass Insulator in America 1967 Report
CD 168.5             Unique to NO NAME 1976 Millhollands Most About Glass Insulators Bicentennial Edition
CD 168.6                
CD 169   Secondary         WHITALL TATUM ¸ (1922-1946) or HEMINGRAY (1865-1970) 1969 The Glass Insulator in America 1969 Report
CD 169.5   Telegraph   1869> 1921<   Unique to BROOKFIELD (1869-1921) 1976 Millhollands Most About Glass Insulators Bicentennial Edition
CD 170   Secondary         Unique to NO EMBOSSING 1969 The Glass Insulator in America 1969 Report
CD 170.1   Secondary         Unique to NO EMBOSSING 1973 The Glass Insulator A Comprehensive Reference
CD 170.4               1979 1979 Milholland's Suggested Insulator Price Guide. Not in McDougald's
CD 171 Telegraph or Heavy Telegraph Telegraph       Brookfield 1912 Catalog     Never Officially Assigned
CD 172 Small Deep Groove Double Petticoat Secondary       Brookfield 1912 Catalog     Never Officially Assigned
CD 173   Secondary   1869> 1921< 1912< Brookfield 1912 Catalog Unique to BROOKFIELD (1869-1921) 1967 The Glass Insulator in America 1967 Report
CD 174 Wide Groove DP Secondary   1869> 1921< 1912< Brookfield 1912 Catalog Unique to BROOKFIELD (1869-1921) 1967 The Glass Insulator in America 1967 Report
CD 174.5                
CD 175   Secondary Door Knob 1870> 1967<   Unique to HEMINGRAY (1865-1970) 1967 The Glass Insulator in America 1967 Report
CD 175.5                
CD 176 Carrier Telephone Mushroom 1929     Unique to WHITALL TATUM ¸ (1922-1946) Pat'd 1929 1976 Millhollands Most About Glass Insulators Bicentennial Edition
CD 176.9     Toadstool       Unique to HEMINGRAY 2000
CD 177             Previously foreign (VEGLA)   Never Officially Assigned
CD 178 Santa Ana 7 500v Santa Ana 1912< 1912> Brookfield 1912 Catalog   1967 The Glass Insulator in America 1967 Report
CD 178.5       1915>     Unique to LOCKE (1892-). Only embossing includes 1915 Patent date. 1995 1995 Price Guide for Insulators
CD 179             Previously foreign (ESA ILNS SEDIVER)   Never Officially Assigned
CD 180 Liquid Insulator   Liquid Insulator 1894<     Unique to LIQUID INSULATOR old style as of 1894 Pat 1976 Millhollands Most About Glass Insulators Bicentennial Edition
CD 180.1     Fluid Insulator 1894<     Unique to FLUID INSULATOR old style as of 1894 Pat 1990 Insulators A History and Guide to North American Glass Pintype Insulators. Now CD 180.5
CD 180.5     Fluid Insulator 1894<       1999 McDougald's 1999 Price Guide
CD 181     Pluto       Unique to NO EMBOSSING 1973 The Glass Insulator A Comprehensive Reference
CD 181.5     Spaceman       Unique to NO EMBOSSING 1995 1995 Price Guide for Insulators
CD 182 Dry Spot Telegraph Dry Spot 1929 1946<   Unique to DRY SPOT INSULATOR Whitall Tatum (1922-1946) Pat'd 1929 1976 Millhollands Most About Glass Insulators Bicentennial Edition
CD 183   Primary   1870> 1967<   Unique to HEMINGRAY (1865-1970) 1967 The Glass Insulator in America 1967 Report
CD 184     Climax 1869> 1921<   Unique to CLIMAX Brookfield (1869-1921) dump item 1990 Insulators A History and Guide to North American Glass Pintype Insulators
CD 185 Mine Insulator   Mine Insulator 1912< 1912> Brookfield 1912 Catalog   1967 The Glass Insulator in America 1967 Report
CD 185.2             Unique to B.E.L.CO. 1976 Millhollands Most About Glass Insulators Bicentennial Edition
CD 186       1870> 1967<   Unique to HEMINGRAY (1865-1970) 1976 Millhollands Most About Glass Insulators Bicentennial Edition
CD 186.1       1870> 1967<   Unique to HEMINGRAY (1865-1970) 1976 Millhollands Most About Glass Insulators Bicentennial Edition
CD 186.2     Nut 1870> 1967<   Unique to HEMINGRAY (1865-1970) 1976 Millhollands Most About Glass Insulators Bicentennial Edition
CD 187 Brown Pony Telephone Duplex 1912< 1912> Brookfield 1912 Catalog   1967 The Glass Insulator in America 1967 Report
CD 188 Brown Deep Groove   Duplex 1912< 1912> Brookfield 1912 Catalog   1967 The Glass Insulator in America 1967 Report
CD 189                 Never Officially Assigned
CD 190/191 Hibbard Transposition Telephone Two Piece Tramp 1912< 1912> Brookfield 1912 Catalog   1967 The Glass Insulator in America 1967 Report
CD 192.1/193.1     Two Piece Tramp       AM.TEL.& TEL.CO. (1885-1915) or NO EMBOSSING 1988 Insulators A History and Guide to North American Glass Pintype Insulators 192.1 / Millhollands Most About Glass Insulators Bicentennial Edition 193.1
CD 192/193 Hibbard Transposition Telephone Two Piece Tramp       AM.TEL.& TEL.CO. (1885-1915) or NO EMBOSSING 1976 Millhollands Most About Glass Insulators Bicentennial Edition
CD 194.5/195.5     Two Piece Tramp 1930 1941<   Unique to PYREX (1924-1941) Pat'd 1930 1990 Insulators A History and Guide to North American Glass Pintype Insulators
CD 194/195 Transposition Telephone Two Piece Tramp 1870> 1967<   Unique to HEMINGRAY (1865-1970) 1969 The Glass Insulator in America 1969 Report
CD 196 Perfect Transposition Telephone Tramp 1912< 1912> 1912< Brookfield 1912 Catalog   1967 The Glass Insulator in America 1967 Report
CD 196.2     Tramp 1883> 1910< (1893-1910 per Bob Stahr note) Unique to H.G.CO. 1990 Insulators A History and Guide to North American Glass Pintype Insulators
CD 196.5     Tramp 1883> 1910< (1893-1910 per Bob Stahr note) Unique to H.G.CO. 1990 Insulators A History and Guide to North American Glass Pintype Insulators
CD 197 Transposition Telephone Tramp       WHITALL TATUM ¸ (1922-1946) or HEMINGRAY (1865-1970) 1967 The Glass Insulator in America 1967 Report
CD 198                 Never Officially Assigned
CD 199 Transposition Telephone Tramp 1902 1903   Unique to PRISM ¬ (1902-1903) 1973 The Glass Insulator A Comprehensive Reference
CD 200 Transposition Telephone Tramp 1912< 1912> 1912< Brookfield 1912 Catalog STAR ¥ CALIFORNIA (1912-1916) or NO NAME 1967 The Glass Insulator in America 1967 Report
CD 201 Transposition Telephone Tramp       HEMINGRAY (1865-1970) CALIFORNIA (1912-1916) or H.G.CO. 1967 The Glass Insulator in America 1967 Report
CD 202 Transposition Telephone Tramp 1896 1912> Per Locke biography 1912< Brookfield 1912 Catalog   1967 The Glass Insulator in America 1967 Report
CD 203 Transposition Telephone Tramp 1946   Per N.R. Woodward on Whitall Tatum   1967 The Glass Insulator in America 1967 Report
CD 203.2 Transposition Telephone Tramp 1956 1969<   Unique to ARMSTRONG Á (1946-1969) Pat'd 1956 1976 Millhollands Most About Glass Insulators Bicentennial Edition
CD 204 Transposition Telephone Locke Crosstop or Tramp 1892 1895 Per Locke biography. LOCKE (1892-) or NO EMBOSSING Pat'd 1894. NO EMBOSSINGs made first around 1892 only manufactured for a short while. 1973 The Glass Insulator A Comprehensive Reference
CD 205 Transposition Telephone or Secondary Tramp 1912< 1912> 1912< Brookfield 1912 Catalog   1967 The Glass Insulator in America 1967 Report
CD 205.5 Large Double Groove DP           Unique to NO EMBOSSING 1988 The Glass Insulator in America 1988 Report
CD 206   Telephone Castle       Unique to NO EMBOSSING 1969 The Glass Insulator in America 1969 Report
CD 206.5   Telephone Claw 1902 1906   Unique to HARLOE » (1902-1906) 1979 1979 Milholland's Suggested Insulator Price Guide
CD 207       1900 1921<   Unique to B Pat'd 1900 1973 The Glass Insulator A Comprehensive Reference
CD 207.5                
CD 208 Top Groove Telephone Telephone Top Groove Hot Cross Bun         1967 The Glass Insulator in America 1967 Report
CD 209           GIFONA -- Chilean piece.     GIFONA
CD 210 Standard Postal Telegraph Telegraph   1917     POSTAL or NO EMBOSSING Pat'd 1917 1967 The Glass Insulator in America 1967 Report
CD 211 No Leak Telegraph No Leak 1908 1921< 1909 - 12 or so per trade articles from Elton/Bob Stahr Unique to BROOKFIELD (1869-1921) Pat'd 1908 1973 The Glass Insulator A Comprehensive Reference
CD 212                 Never Officially Assigned
CD 213 Top Groove Western Union Telegraph   1870> 1967<   Unique to HEMINGRAY (1865-1970) 1967 The Glass Insulator in America 1967 Report
CD 214   Telegraph           1967 The Glass Insulator in America 1967 Report
CD 215                 Never Officially Assigned
CD 216   Primary           1967 The Glass Insulator in America 1967 Report
CD 217   Primary   1946> 1969<   Unique to ARMSTRONG Á (1946-1969) 1967 The Glass Insulator in America 1967 Report
CD 218   Primary   1870> 1967<   Unique to HEMINGRAY (1865-1970) 1976 Millhollands Most About Glass Insulators Bicentennial Edition
CD 219   Primary         HEMINGRAY (1865-1970) or NO EMBOSSING 1967 The Glass Insulator in America 1967 Report
CD 220   Primary   1870> 1967<   Unique to HEMINGRAY (1865-1970) 1967 The Glass Insulator in America 1967 Report
CD 220.1               1979 1979 Milholland's Suggested Insulator Price Guide. Not in McDougald's
CD 221   Primary         WHITALL TATUM ¸ (1922-1946) or HEMINGRAY (1865-1970) 1967 The Glass Insulator in America 1967 Report
CD 222 Small Top Groove Double Petticoat 5 000v       Brookfield 1912 Catalog     Never Officially Assigned
CD 223 High Voltage Double Petticoat 7 500v       Brookfield 1912 Catalog     Never Officially Assigned
CD 224 High Voltage Double Petticoat 10 000v       Brookfield 1912 Catalog     Never Officially Assigned
CD 225   5 000v   1869> 1921< 1912< Brookfield 1912 Catalog Unique to BROOKFIELD (1869-1921) 1967 The Glass Insulator in America 1967 Report
CD 226   5 000v   1912< 1912> Brookfield 1912 Catalog Unique to NO NAME 1967 The Glass Insulator in America 1967 Report
CD 226.3   Primary   1903> 1921<   Unique to B 1988 The Glass Insulator in America 1988 Report
CD 227 Large Groove Double Petticoat 5 000v       Brookfield 1912 Catalog     Never Officially Assigned
CD 228   10 000v   1869> 1921< 1912< Brookfield 1912 Catalog Unique to BROOKFIELD (1869-1921) 1967 The Glass Insulator in America 1967 Report
CD 228.5   Primary   1946> 1969<   Unique to ARMSTRONG Á (1946-1969) 1988 The Glass Insulator in America 1988 Report
CD 229 Top Groove Double Petticoat 3 000v       Brookfield 1912 Catalog     Never Officially Assigned
CD 229.6   Primary   1920 1930   Unique to NO EMBOSSING (FRY 1920-1930) 1988 The Glass Insulator in America 1988 Report
CD 230   6 600v Frog Eyes         1967 The Glass Insulator in America 1967 Report
CD 230.1   6 600v   1870> 1967<   Unique to HEMINGRAY (1865-1970) 1976 Millhollands Most About Glass Insulators Bicentennial Edition
CD 230.2   6 600v   1946> 1969<   Unique to ARMSTRONG Á (1946-1969) 1976 Millhollands Most About Glass Insulators Bicentennial Edition
CD 231   Primary   1951   1951 start per N.R. Woodward KIMBLE (1952-1970) or HEMINGRAY (1865-1970) 1976 Millhollands Most About Glass Insulators Bicentennial Edition
CD 231.2   Primary   1952> 1970<   Unique to KIMBLE (1952-1970) 1973 The Glass Insulator A Comprehensive Reference
CD 232   11 000v   1870> 1967<   Unique to HEMINGRAY (1865-1970) 1967 The Glass Insulator in America 1967 Report
CD 232.1   11 000v   1870> 1967<   Unique to HEMINGRAY (1865-1970) 1973 The Glass Insulator A Comprehensive Reference
CD 232.2                
CD 233   6 600v   1926   1912< Brookfield 1912 Catalog Per McDougalds 1967 The Glass Insulator in America 1967 Report
CD 233.2       1870> 1967<   Unique to HEMINGRAY (1865-1970) 1990 Insulators A History and Guide to North American Glass Pintype Insulators
CD 234   8 000v   1924> 1941<   Unique to PYREX (1924-1941) 1967 The Glass Insulator in America 1967 Report
CD 234.5                
CD 235   8 000v   1926 1941< Start date per McDougalds. Unique to PYREX (1924-1941). 1967 The Glass Insulator in America 1967 Report
CD 236   Primary   1869> 1921<   Unique to BROOKFIELD (1869-1921) 1976 Millhollands Most About Glass Insulators Bicentennial Edition
CD 237   13 500v   1870> 1967<   Unique to HEMINGRAY (1865-1970) 1967 The Glass Insulator in America 1967 Report
CD 238   Primary   1870> 1967<   Unique to HEMINGRAY (1865-1970) 1967 The Glass Insulator in America 1967 Report
CD 238.1       1870> 1967<   Unique to HEMINGRAY (1865-1970) 1995 1995 Price Guide for Insulators
CD 238.2       1946> 1969<   Unique to ARMSTRONG Á (1946-1969) 1990 Insulators A History and Guide to North American Glass Pintype Insulators
CD 238.6                
CD 239   Primary   1951   1951 start per N.R. Woodward KIMBLE (1952-1970) or HEMINGRAY (1865-1970) 1967 The Glass Insulator in America 1967 Report
CD 239.2   Primary   1952> 1970<   Unique to KIMBLE (1952-1970) 1976 Millhollands Most About Glass Insulators Bicentennial Edition. Not listed in Woodward's 1988 Report
CD 240   13 500v   1927 1941< Start date per McDougalds. Unique to PYREX (1924-1941). 1967 The Glass Insulator in America 1967 Report
CD 240.2   Primary         NO NAME or NO EMBOSSING 1976 Millhollands Most About Glass Insulators Bicentennial Edition
CD 240.5   Primary   1926 1941< Start date per McDougalds. Unique to PYREX (1924-1941). 1976 Millhollands Most About Glass Insulators Bicentennial Edition
CD 241   6 600v   1916~ 1967< Start date per Locke biography Unique to HEMINGRAY (1865-1970). 1967 The Glass Insulator in America 1967 Report
CD 241.2   6 600v   1870> 1967<   Unique to HEMINGRAY (1865-1970) 1976 Millhollands Most About Glass Insulators Bicentennial Edition
CD 242   10 000v   1870> 1967<   Unique to HEMINGRAY (1865-1970) 1967 The Glass Insulator in America 1967 Report
CD 243   15 000v   1870> 1967<   Unique to HEMINGRAY (1865-1970) 1967 The Glass Insulator in America 1967 Report
CD 244     Pomona or Crosstop 1892~ 1895~   Unique to NO EMBOSSING Line construction use from ~1892 to 1895 1976 Millhollands Most About Glass Insulators Bicentennial Edition
CD 244.5             Unique to GREELEY 1990 Insulators A History and Guide to North American Glass Pintype Insulators
CD 245   Primary   1883 1892   Unique to T-H. (1883-1892) 1973 The Glass Insulator A Comprehensive Reference
CD 245.2                
CD 246 High Voltage Double Petticoat 10 000v       Brookfield 1912 Catalog     Never Officially Assigned
CD 247   Primary         Unique to NO EMBOSSING 1976 Millhollands Most About Glass Insulators Bicentennial Edition
CD 247.3                
CD 248/311/311 Montana 15 000v Montana or Stacker       HEMINGRAY (1865-1970) or PYREX (1924-1941) 1967 The Glass Insulator in America 1967 Report
CD 249 Provo   Provo 1902 1967< Bob Stahr (7/7/9 note) agreement dated Aug 2 1902 with shipment due 60 days after Unique to HEMINGRAY (1865-1970) 1976 Millhollands Most About Glass Insulators Bicentennial Edition
CD 250   Cable   1899 1899   Unique to N.E.G.M.CO. (1899) 1969 The Glass Insulator in America 1969 Report
CD 250.2   Telephone         Unique to ERICSSON 1976 Millhollands Most About Glass Insulators Bicentennial Edition
CD 251   Cable   1912< 1912> Brookfield 1912 Catalog   1967 The Glass Insulator in America 1967 Report
CD 252 Knowles Cable Cable   1912< 1912> Brookfield 1912 Catalog   1967 The Glass Insulator in America 1967 Report
CD 253 Knowles Cable Cable   1900 1903   Unique to KNOWLES (1900-1903) 1976 Millhollands Most About Glass Insulators Bicentennial Edition
CD 254 Knowles Cable Cable   1912< 1912> Brookfield 1912 Catalog   1967 The Glass Insulator in America 1967 Report
CD 255   Cable       Woodward's 1988     Never Officially Assigned
CD 256 Manhattan Cable Cable Manhattan       Unique to MANHATTAN 1969 The Glass Insulator in America 1969 Report
CD 257   Cable Mickey Mouse       HEMINGRAY (1865-1970) or PATENT - OTHER 1967 The Glass Insulator in America 1967 Report
CD 258   Cable Roman Helmet       Unique to CABLE 1976 Millhollands Most About Glass Insulators Bicentennial Edition
CD 259   Cable Roman Helmet 1912< 1912> Brookfield 1912 Catalog   1967 The Glass Insulator in America 1967 Report
CD 260   Cable Roman Helmet         1969 The Glass Insulator in America 1969 Report
CD 261                 Never Officially Assigned
CD 262 Columbia Single Petticoat Cable Baby Columbia 1912< 1912> Brookfield 1912 Catalog Unique to COLUMBIA 1967 The Glass Insulator in America 1967 Report
CD 263 Columbia Cable Columbia 1912< 1912> Brookfield 1912 Catalog   1967 The Glass Insulator in America 1967 Report
CD 264 Columbia Cable Columbia       Unique to COLUMBIA 1976 Millhollands Most About Glass Insulators Bicentennial Edition
CD 265 Fisher Third Rail Fisher 1883> 1888~   FISHER or NO EMBOSSING Electric railway developed mid 1880s in use 'till 1888 1973 The Glass Insulator A Comprehensive Reference
CD 265.1                
CD 266 Boston Cable Cable Boston Cable 1890>     Unique to PATENT - OTHER (1890 Date) 1967 The Glass Insulator in America 1967 Report
CD 267 Boston Cable Cable   1912< 1912> Brookfield 1912 Catalog   1967 The Glass Insulator in America 1967 Report
CD 267.5   Cable Straight Sides 1899 1899   Unique to N.E.G.M.CO. (1899) 1976 Millhollands Most About Glass Insulators Bicentennial Edition
CD 268 Crown Cable Crown 1895 1912> Brookfield 1912 Catalog Unique to THE CROWN Pat'd 1895 1967 The Glass Insulator in America 1967 Report
CD 268.5   Cable   1893 1894   Unique to STANDARD (1893-1894) 1976 Millhollands Most About Glass Insulators Bicentennial Edition
CD 269 New Jumbo Cable Eared Jumbo 1912< 1912> Brookfield 1912 Catalog OAKMAN MFG.CO. (1890-1897) or JUMBO 1967 The Glass Insulator in America 1967 Report
CD 270   Cable         Unique to NO EMBOSSING 1976 Millhollands Most About Glass Insulators Bicentennial Edition
CD 271                
CD 272   6 600v   1912< 1912> Brookfield 1912 Catalog   1967 The Glass Insulator in America 1967 Report
CD 273   5 000v   1912< 1912> Brookfield 1912 Catalog Unique to NO EMBOSSING 1967 The Glass Insulator in America 1967 Report
CD 274 High Voltage Double Petticoat 11 000v       Brookfield 1912 Catalog     Never Officially Assigned
CD 275   10 000v   1912< 1912> Brookfield 1912 Catalog LOCKE (1892-) or NO NAME 1967 The Glass Insulator in America 1967 Report
CD 276                 Never Officially Assigned
CD 277 Extra Large Top Groove Double Petticoat 6 600v       Brookfield 1912 Catalog     Never Officially Assigned
CD 278                 Never Officially Assigned
CD 279                 Never Officially Assigned
CD 280   Primary           1967 The Glass Insulator in America 1967 Report
CD 281   10 000v         HEMINGRAY (1865-1970) or LYNCHBURG ¨ (1923-1925) 1967 The Glass Insulator in America 1967 Report
CD 282 Provo 13 200v Provo 1897   Included in 1897 Electrical Appliance Catalog   1967 The Glass Insulator in America 1967 Report
CD 283 Provo 15 000v Provo 1897   Included in 1897 Electrical Appliance Catalog   1967 The Glass Insulator in America 1967 Report
CD 284 Floy 11 000v   1912< 1912> Brookfield 1912 Catalog Unique to FLOY 1967 The Glass Insulator in America 1967 Report
CD 285 4-inch Edison   Edison 1892     Unique to NO EMBOSSING Pat'd 1892 1967 The Glass Insulator in America 1967 Report
CD 286       1892>     Unique to LOCKE (1892-) 1976 Millhollands Most About Glass Insulators Bicentennial Edition
CD 286.9       1886> 1898<   Unique to WESTINGHOUSE (1886-1898) 1990 Insulators A History and Guide to North American Glass Pintype Insulators
CD 287   10 000v   1895 1912> Start date per Locke biography Brookfield 1912 Catalog LOCKE (1892-) or NO NAME. NO NAME manufactured by Brookfield. 1967 The Glass Insulator in America 1967 Report
CD 287.1       1894 1895 Dates per Locke biography. Unique to LOCKE (1892-). Manufactured by Brookfield. 1976 Millhollands Most About Glass Insulators Bicentennial Edition
CD 287.2       1891 1894 Dates per Locke biography Unique to BROOKFIELD (1869-1921). 1973 The Glass Insulator A Comprehensive Reference
CD 288 Mershon 12 000v Mershon 1912< 1912> Brookfield 1912 Catalog   1967 The Glass Insulator in America 1967 Report
CD 289   18 000v   1912< 1912> Brookfield 1912 Catalog LOCKE (1892-) or NO EMBOSSING 1967 The Glass Insulator in America 1967 Report
CD 289.9       1889 1893 Dates per Locke biography. Unique to PATENT - OTHER Pat'd 1889. 1990 Insulators A History and Guide to North American Glass Pintype Insulators
CD 290                 Never Officially Assigned
CD 291             HEMINGRAY (1865-1970) or NO NAME 1976 Millhollands Most About Glass Insulators Bicentennial Edition
CD 292 Lachine Triple Petticoat Primary           1967 The Glass Insulator in America 1967 Report
CD 292.5       1900 1903   Unique to KNOWLES (1900-1903) 1976 Millhollands Most About Glass Insulators Bicentennial Edition
CD 293   Primary   1897     Unique to LOCKE (1892-) 1976 Millhollands Most About Glass Insulators Bicentennial Edition
CD 293.1   Primary   1892>     Unique to LOCKE (1892-) 1988 The Glass Insulator in America 1988 Report
CD 294       1899 1899   Unique to N.E.G.M.CO. (1899) 1976 Millhollands Most About Glass Insulators Bicentennial Edition
CD 295   10 000v   1870> 1967<   Unique to HEMINGRAY (1865-1970) 1967 The Glass Insulator in America 1967 Report
CD 296   10 000v   1912< 1912> Brookfield 1912 Catalog   1967 The Glass Insulator in America 1967 Report
CD 297   15 000v   1912< 1912> Brookfield 1912 Catalog   1967 The Glass Insulator in America 1967 Report
CD 298     Ballerina       Unique to NO EMBOSSING 1976 Millhollands Most About Glass Insulators Bicentennial Edition
CD 299   11 000v   1869> 1921< 1912< Brookfield 1912 Catalog Unique to BROOKFIELD (1869-1921) 1967 The Glass Insulator in America 1967 Report
CD 299.1   10 000v   1902 1903   Unique to PRISM ¬ (1902-1903) 1976 Millhollands Most About Glass Insulators Bicentennial Edition
CD 299.2   Primary   1920 1930   Unique to NO EMBOSSING (FRY 1920-1930) 1976 Originally CD 315.5? Millhollands Most About Glass Insulators Bicentennial Edition. Not listed in 1979 Price Guide
CD 299.7                
CD 300   20 000v   1912< 1912> Brookfield 1912 Catalog LOCKE (1892-) or BROOKFIELD (1869-1921) 1967 The Glass Insulator in America 1967 Report
CD 301             Unique to NO EMBOSSING 1976 Millhollands Most About Glass Insulators Bicentennial Edition
CD 301.2   Primary   1920 1930   Unique to NO EMBOSSING (FRY 1920-1930) 1988 The Glass Insulator in America 1988 Report
CD 301.5       1870> 1967<   Unique to HEMINGRAY (1865-1970) 1976 Millhollands Most About Glass Insulators Bicentennial Edition. Not listed in Woodward's 1988 Report
CD 302 7-inch Muncie 15 000v Muncie 1870> 1967<   Unique to HEMINGRAY (1865-1970) 1967 The Glass Insulator in America 1967 Report
CD 303.5     Provo 1870> 1967<   Unique to HEMINGRAY (1865-1970) 1990 Insulators A History and Guide to North American Glass Pintype Insulators
CD 303/310 9-inch Muncie 20 000 Muncie 1870> 1967<   Unique to HEMINGRAY (1865-1970) 1967 The Glass Insulator in America 1967 Report
CD 304/310     Coolie Hat       HEMINGRAY (1865-1970) or NO EMBOSSING 1976 Millhollands Most About Glass Insulators Bicentennial Edition. Not listed in 1979 Price Guide
CD 305 Small Top Groove Triple Petticoat 7 500v       Brookfield 1912 Catalog     Never Officially Assigned
CD 306       1923 1925   Unique to LYNCHBURG ¨ (1923-1925) 1973 The Glass Insulator A Comprehensive Reference
CD 307   10 000v Viking Helmet 1870> 1967<   Unique to HEMINGRAY (1865-1970) 1967 The Glass Insulator in America 1967 Report
CD 308 Cable 6 600v Viking Helmet 1912< 1912> Brookfield 1912 Catalog NO EMBOSSING or NO NAME 1967 The Glass Insulator in America 1967 Report
CD 309     Beal's 1899     Unique to BEAL'S Pat'd 1899 1990 Insulators A History and Guide to North American Glass Pintype Insulators
CD 309.5       1886> 1898<   Unique to WESTINGHOUSE (1886-1898) 1990 Insulators A History and Guide to North American Glass Pintype Insulators
CD 310                
CD 311                
CD 312             Unique to NO EMBOSSING 1990 Insulators A History and Guide to North American Glass Pintype Insulators. Previously sleeve to CD 249 has been dropped in 2003 PG.
CD 313             Unique to NO EMBOSSING 1990 Insulators A History and Guide to North American Glass Pintype Insulators
CD 313.1             Unique to NO EMBOSSING 1990 Insulators A History and Guide to North American Glass Pintype Insulators
CD 314             Unique to NO EMBOSSING 1990 Insulators A History and Guide to North American Glass Pintype Insulators. Previously sleeve to CD 317.7 has been dropped in 2003 PG.
CD 315 Type HG     1902 1903   Unique to PRISM ¬ (1902-1903) 1967 The Glass Insulator in America 1967 Report
CD 315.5               1979 1979 Milholland's Suggested Insulator Price Guide. Not in McDougald's
CD 316   7 500v   1869> 1921< 1912< Brookfield 1912 Catalog Unique to BROOKFIELD (1869-1921) 1967 The Glass Insulator in America 1967 Report
CD 316.5               1979 1979 Milholland's Suggested Insulator Price Guide. Not in McDougald's
CD 317   Lightning Rod Candlestick or Bell Chambers 1877>     Unique to CHAMBERS Pat'd 1877 1973 The Glass Insulator A Comprehensive Reference
CD 317.5   Lightning Rod   1877>     Unique to CHAMBERS Pat'd 1877 1973 The Glass Insulator A Comprehensive Reference
CD 317.7       1883> 1910< (1893-1910 per Bob Stahr note) Unique to H.G.CO. 1990 Insulators A History and Guide to North American Glass Pintype Insulators
CD 317.8/313/313/313.1       1902     Unique to PATENT - OTHER Pat'd 1902 1990 Insulators A History and Guide to North American Glass Pintype Insulators
CD 317.9             Unique to NO EMBOSSING 1976 Millhollands Most About Glass Insulators Bicentennial Edition
CD 318 Niagara High Potential 20 000v   1892> 1912> Brookfield 1912 Catalog Unique to LOCKE (1892-) 1967 The Glass Insulator in America 1967 Report
CD 319 Special High Potential 21 000v   1892> 1912> Brookfield 1912 Catalog Unique to LOCKE (1892-) 1967 The Glass Insulator in America 1967 Report
CD 320   17 000v   1924> 1941<   Unique to PYREX (1924-1941) 1967 The Glass Insulator in America 1967 Report
CD 321     Bat Ears 1902 1903   PRISM ¬ (1902-1903) or PATENT - OTHER 1969 The Glass Insulator in America 1969 Report
CD 322   23 000v   1927 1941< Start date per McDougalds. Unique to PYREX (1924-1941). 1967 The Glass Insulator in America 1967 Report
CD 323   30 000v   1926 1941< Start date per McDougalds. Unique to PYREX (1924-1941). 1967 The Glass Insulator in America 1967 Report
CD 324   35 000v   1932 1941< Start date per McDougalds. Unique to PYREX (1924-1941). 1967 The Glass Insulator in America 1967 Report
CD 325   40 000v   1926 1941< Start date per McDougalds. Unique to PYREX (1924-1941). 1967 The Glass Insulator in America 1967 Report
CD 326   45 000v   1932 1941< Start date per McDougalds. Unique to PYREX (1924-1941). 1967 The Glass Insulator in America 1967 Report
CD 327   50 000v   1926 1941< Start date per McDougalds. Unique to PYREX (1924-1941). 1967 The Glass Insulator in America 1967 Report
CD 328   55 000v   1932 1941< Start date per McDougalds. Unique to PYREX (1924-1941). 1967 The Glass Insulator in America 1967 Report
CD 328.2       1924> 1941<   Unique to PYREX (1924-1941) 1995 1995 Price Guide for Insulators
CD 329                 Never Officially Assigned
CD 330   66 000v   1932 1941< Start date per McDougalds. Unique to PYREX (1924-1941). 1967 The Glass Insulator in America 1967 Report
CD 331   70 000v   1930 1941< Start date per McDougalds. Unique to PYREX (1924-1941). 1967 The Glass Insulator in America 1967 Report
CD 332                 Never Officially Assigned
CD 333       1902 1903   Unique to PRISM ¬ (1902-1903) 1973 The Glass Insulator A Comprehensive Reference
CD 338   16 000v   1869> 1921<   Unique to BROOKFIELD (1869-1921) 1967 The Glass Insulator in America 1967 Report
CD 342   25 000v   1892>     Unique to LOCKE (1892-) 1967 The Glass Insulator in America 1967 Report
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