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 (inclusively), 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 [NRW67]
CD 100.2   Electric Fence   1945~ 1955~   Unique to SURGE (1940-1978) 1976 [Mil76]
CD 100.5 "J" Carrier Midspan Transposition   1924> 1941<   Unique to PYREX (1924-1941) 1973 [GIaCR]
CD 100.6       1870> 1967<   Unique to HEMINGRAY (1865-1970) 1979 [MilSPG79]
CD 101 Pony Telephone   1903> 1921<   Unique to BROOKFIELD (1869-1921). Embossing BROOKFIELD only. 1973 [GIaCR]
CD 102 Pony Telephone Pony 1878   Per N.R. Woodward on Hemingray   1967 [NRW67]
CD 102.3   Telephone   1890 1897   NO NAME or K.C.G.W. (1890-1897). NO NAME of KCGW origin per McDougalds. 1973 [GIaCR]
CD 102.4   Telephone   1883> 1888< [1] Unique to NEW ENG.TEL.& TEL.CO. 1976 [Mil76]
CD 102.7               1979 [MilSPG79]. No other reference. Re-assigned to CD 140.5
CD 103 Pony Telephone         NO NAME B or GAYNER (1920-1923) 1967 [NRW67]
CD 103.4   Telephone         Unique to NO EMBOSSING 1976 [Mil76]
CD 104 National Pony Telephone   1912< 1912>     1967 [NRW67]
CD 105   Telephone   1883 1886   NO EMBOSSING or AM.INSULATOR CO. (1883-1886). NO EMBOSSING an American product per McDougalds. 1973 [GIaCR]
CD 106 Pony Telephone Pony 1892~ 1955 [2][3]   1967 [NRW67]
CD 106.1 Pony Telephone   1885 1895   Unique to DUQUESNE 1988 [NRW88]
CD 106.2   Telephone         Unique to P.S.S.A. 1976 [Mil76]
CD 106.3   Telephone   1885 1895   DUQUESNE or NO EMBOSSING. NO EMBOSSING a Duquesne product. 1976 [Mil76]
CD 106.4   Telephone         Unique to NO EMBOSSING - MEXICO 1969 Originally CD 406. [NRW69]
CD 106.5   Telephone   1940 1959   Unique to CRISOL TEXCOCO 1988 [NRW88]
CD 107 Pony Telephone   1924> 1969<   Start date based on ¸ marking end date based on Armstrong marking. All others fall within range. 1967 [NRW67]
CD 107.2   Telephone         Unique to NO EMBOSSING 1976 [Mil76]. Not listed in 1979 Price Guide
CD 108 Pony Telephone           1969 [NRW69]
CD 109 Fiske & Mott Pony Telephone Teardrop Pony or Chicago Teardrop Pony 1893 1894   Unique to CHICAGO INSULATING CO. (1893-1894) 1973 [GIaCR] (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. [NRW69]
CD 109.7     Johnson & Watson 1908     Unique to JOHNSON & WATSON Pat'd 1908 1976 [Mil76]. Not listed in Woodward's 1988 Report
CD 109.9     Ram's Head       Unique to PAT APP FOR 1976? [Mil76]. 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 [NRW67]
CD 110.5   Telephone Corkscrew or Screw Top 1884 1886   Unique to NATIONAL INSULATOR CO. (1884-1886) 1973 [GIaCR]
CD 110.6   Telephone Corkscrew or Screw Top 1884 1886   Unique to NATIONAL INSULATOR CO. (1884-1886) 1976 [Mil76]
CD 111 Carrier Telephone   1926 1941< Start date based on McDougalds. Unique to PYREX (1924-1941). 1976 [Mil76]
CD 112 Pony Double Groove Telephone Keg or Exchange 1886> 1912>     1967 [NRW67]
CD 112.4   Telephone Exchange 1890> 1933<   Based on ???? 1973 [GIaCR]
CD 112.5   Telephone Exchange     McDougald's 2003 combined w/CD 112.4 NO EMBOSSING or NO NAME Canadians 1976 [Mil76]. Not listed in Woodward's 1988 Report
CD 113 Pony Double Groove Telephone Keg or Exchange 1886>       1967 [NRW67]
CD 113.2   Telephone Exchange 1885 1895   DUQUESNE or NO NAME 1976 [Mil76]
CD 113.4     Exchange         1979 [MilSPG79]. 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). 1967 [NRW67]
CD 114.2   Telephone Exchange 1893 1894   Unique to STANDARD GLASS INSULATOR CO. (1893-1894) 1976 [Mil76]
CD 115 Exchange Telephone Exchange 1886> 1912>     1967 [NRW67]
CD 115.1   Telephone   1886>     Unique to NO EMBOSSING. 1988 [NRW88]
CD 116 Large Double Groove Telephone Three Rumple 1886> 1912>     1967 [NRW67]
CD 116.5 Double Groove     1903> 1921<   Unique to B 1973 [GIaCR]
CD 117 Twisted Pair Telephone   1886> 1912>   Unique to NO NAME. 1967 [NRW67]
CD 118   Telephone   1928> 1969<   Unique to NO EMBOSSING. Hemingray dump item start date based on use of carnival. 1973 [GIaCR]
CD 119 O'Brien Patent Telephone O'Brien 1885 1903<   Unique to BROOKFIELD (1869-1921) (Pat'd 1885). End based on use of "W" in embossing. 1967 [NRW67]
CD 120 Pony Telephone           1969 [NRW69]
CD 120.2 Pony Telephone         PAT APP FOR or PONY 1973 [GIaCR]. Combined with CD 120 in 2003 McDougald's Price Guide.
CD 121 Toll Telephone Toll 1912< 1912>     1967 [NRW67]
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 [GIaCR]
CD 122 Toll Telephone Toll         1967 [NRW67]
CD 122.4 CW Carrier Telephone         PYREX (1924-1941) or HEMINGRAY (1865-1970) 1973 [GIaCR]
CD 123   Telegraph   1870 1880   Unique to E.C.& M.CO. (1870-1880) 1969 [NRW69]
CD 123.2   Telegraph   1870 1879<   Unique to CHESTER (1855-1879) (Pat'd 1870 date) 1988 [NRW88]
CD 124 National Pony Telephone           1967 [NRW67]
CD 124.1                
CD 124.2   Telephone   1871>     Unique to PATENT - DEC. 19 1871 1973 [GIaCR]
CD 124.3   Telephone   1871>     Unique to PATENT - DEC. 19 1871 1973 [GIaCR]
CD 124.5   Lightning Rod Wing Chambers 1877>     Unique to CHAMBERS Pat'd 1877 1973 [GIaCR]
CD 125 Western Union Telegraph           1967 [NRW67]
CD 126 Western Union Telegraph Blob Top 1912< 1912>     1967 [NRW67]
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 [MilSPG79]
CD 126.3 American Union Telegraph         BROOKFIELD (1869-1921) A.U. or NO NAME 1969 Originally CD 427? [NRW69]
CD 126.4 Western Union Telegraph         AM.INSULATOR CO. (1883-1886) or W.E.MFG.CO. 1969 Originally CD 426. [NRW69]
CD 127 Western Union Telegraph           1969 [NRW69]
CD 127.4   Telegraph         PATENT - DEC. 19 1871 or NO EMBOSSING 1976 [Mil76]
CD 127.6               1979 [MilSPG79] listed as a Boston. Also in Millhollands. Dropped in favor of CD 143.6.
CD 128 CS Carrier Telephone           1967 [NRW67]
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. [NRW69]
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 [NRW67]
CD 130   Telegraph   1877> 1908<   Unique to CAL.ELEC.WORKS (1877-1908) 1969 [NRW69]
CD 130.1   Telegraph   1877> 1908<   Unique to CAL.ELEC.WORKS (1877-1908) 1973 [GIaCR]. Not listed in Woodward's 1988 Report
CD 130.2     Seilers 1877     Unique to SEILERS Pat'd 1877 probably made by Hemingray 1979 [MilSPG79]
CD 131   Telegraph   1865> 1890<   Dates based on Brookfield embossings. NO NAME insulators ignored. 1967 [NRW67]
CD 131.4   Telegraph   1875<     Start date based on manufacture by Tillotson 1969 Originally CD 431. [NRW69]
CD 131.8   Telegraph         Unique to NO EMBOSSING 1976 [Mil76]. Not listed in 1979 Price Guide
CD 132   Telegraph Bullet         1969 [NRW69]
CD 132.2   Telegraph         PAISLEY or NO NAME 1976 [Mil76]
CD 132.4   Lightning Rod Chambers Companion 1877     Unique to PATENT - DEC. 19 1871 Pat'd 1877 1973 [GIaCR]
CD 133 Regular Telegraph Telephone Bullet 1912< 1912>     1967 [NRW67]
CD 133.1       1897   Included in 1897 Electrical Appliance Catalog   1990 [McD]
CD 133.2   Telegraph           1973 [GIaCR]
CD 133.3   Telegraph           1976 [Mil76]
CD 133.4   Telegraph Bullet         1969 [Mil76]
CD 133.5             Unique to TEL.FED.MEX 1990 [McD]
CD 134 Deep Groove     1912< 1912>     1967 [NRW67]
CD 134.4   Secondary         Unique to NO EMBOSSING 1976 [Mil76]
CD 134.6 Philadelphia   Mad Hatter 1896 1921<   Unique to BROOKFIELD (1869-1921) Pat'd 1896 1976 [Mil76]
CD 135 Fiske & Mott Regular   Chicago Diamond Groove 1893 1894   Unique to CHICAGO INSULATING CO. (1893-1894) 1969 [NRW69]
CD 135.5   Telegraph   1861>     Unique to ERW 1973 [GIaCR]
CD 136 B&O Telegraph   1869> 1921<   BROOKFIELD (1869-1921) or B & O 1969 [NRW69]
CD 136.4   Telegraph Canadian Boston       NO EMBOSSING or NO NAME 1976 [Mil76]
CD 136.5       1871 1877   Unique to BOSTON BOTTLE WORKS (1871-1877) 1990 [McD]
CD 136.7   Telegraph         PATENT - OTHER (1880-1881) or NO EMBOSSING 1976 [Mil76]
CD 137   Secondary   1870> 1967<   Unique to HEMINGRAY (1865-1970) 1967 [NRW67]
CD 137.4               1979 [MilSPG79]. Not in McDougald's. Deleted as a fake.
CD 137.5             Unique to NO EMBOSSING 1976 [Mil76]
CD 138 Postal Telegraph     1869> 1921<   Unique to BROOKFIELD (1869-1921) 1967 [NRW67]
CD 138.2   Telegraph           1976 [Mil76]
CD 138.9     Twin Pin         1976 [Mil76]
CD 139 Combination Safety   Combination Safety 1903 1912>   Unique to COMBINATION SAFETY Pat'd 1903 1967 [NRW67]
CD 139.6   Secondary   1924> 1941<   Unique to PYREX (1924-1941) 1976 [Mil76]. Not listed in Woodward's 1988 Report
CD 139.8             Unique to NO EMBOSSING 1976 [Mil76]. Not listed in Woodward's 1988 Report
CD 139.9 USLD     1925 1930   Unique to M„LAUGHLIN (1925-1935) 1969 Originally CD 439. [NRW69]
CD 140 Jumbo Feeder Cable Jumbo         1967 [NRW67]
CD 140.5     Cobalt Blob       Unique to NO NAME 1976 Previously CD 102.7 [Mil76]. Not listed in 1979 Price Guide
CD 141   Telephone Hot Cross Bun or Crosstop       Unique to NO EMBOSSING 1969 [NRW69]
CD 141.5             Unique to NO EMBOSSING 1995 [McDPG95]
CD 141.6     Blackburn 1893     Unique to PATENT - OTHER Pat'd 1893 1990 [McD]
CD 141.7     Twiggs 1905     Unique to TWIGGS Pat'd 1905 1988 [NRW88]
CD 141.8     Buzby 1890     Unique to BUZBY Pat'd 1890 1976 Originally CD 109.9. [Mil76]. Not listed in 1979 Report
CD 141.9     Emmingers 1872     Unique to EMMINGER Pat'd 1872 1976 [Mil76]
CD 142 W.U. Iridized Telegraph   1939     HEMINGRAY (1865-1970) or NO NAME Pat'd 1939 1967 [NRW67]
CD 142.4   Telegraph   1939     NO NAME or NO EMBOSSING Pat'd 1939 1976 [Mil76]
CD 143 Dwight Pattern Telegraph           1969 [NRW69]
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 [Mil76]
CD 143.5       1883 1892   Unique to T-H.E.CO. (1883-1892) 1973 [GIaCR]
CD 143.6   Telegraph   1871 1877   Unique to BOSTON BOTTLE WORKS (1871-1877) 1976 [Mil76]. Not listed in Woodward's 1988 Report
CD 144 Foree Bain Patent   Foree Bain 1890     Pat'd 1890 Patent assigned to Hemingray 1901 1969 [NRW69]
CD 144.5     Beehive 1890>     Unique to PATENT - OTHER (1890 Date) 1973 [GIaCR]
CD 145   Telegraph   1883~ 1947> Probably first made by AMERICAN. Hemi clear units made at least until 1947.   1967 [NRW67]
CD 145.5                
CD 145.6   Telegraph         BOSTON BOTTLE WORKS (1871-1877) or NO EMBOSSING 1973 [GIaCR]
CD 146   Telegraph       Woodward's 1967 Unnamed unit   Never Officially Assigned
CD 146.4             Unique to NO EMBOSSING 1988 [NRW88]
CD 146.5             NO NAME or NO EMBOSSING 1976 [Mil76]. Not listed in 1979 Price Guide
CD 147 Barclay Patent Telegraph Spiral Groove or Screw Top 1907 1912>   Pat'd 1907 1967 [NRW67]
CD 148                 [McDPG03]
CD 149 Burbrook   Burbrook       BROOKFIELD (1869-1921) or NO EMBOSSING 1969 [NRW69]
CD 150 Deep Groove DP External Thread   Spiral Groove or Barclay or Screw Top 1907 1912>   BROOKFIELD (1869-1921) or BARCLAY Pat'd 1907 1967 [NRW67]
CD 151 ell Double Petticoat Telegraph           1967 [NRW67]
CD 152 New Western Union Telegraph & Telephone Hoopskirt 1912< 1912>     1967 [NRW67]
CD 152.2                
CD 153   Telegraph & Telephone           1967 [NRW67]
CD 154 Double Petticoat Telegraph & Telephone   1922 1967< Per N.R. Woodward on Hemingray   1967 [NRW67]
CD 154.3                
CD 154.5   Telegraph         DERFLINGHER or NO NAME - MEXICO 1969 Originally CD 454. [NRW69]
CD 154.7                
CD 155   Telegraph & Telephone   1938 1967< Per N.R. Woodward on Hemingray   1967 [NRW67]
CD 155.6       1870> 1967<   Unique to HEMINGRAY (1865-1970) 1976 [Mil76]. Not listed in Woodward's 1988 Report
CD 156   Telegraph           1969 [NRW69]
CD 156.1   Telegraph           1976 [Mil76]
CD 156.2   Telegraph         PATENT - OTHER or NO EMBOSSING 1976 [Mil76]. Not listed in 1979 Price Guide OR Woodward's 1988 Report
CD 157   Telegraph Teepee       BROOKFIELD (1869-1921) or HEMINGRAY (1865-1970) 1969 [NRW69]
CD 157.5   Telegraph   1893 1894   Unique to STANDARD (1893-1894) 1976 [Mil76]
CD 158   Telegraph           1976 [Mil76]
CD 158.1   Telegraph   1871     CHESTER (1871-1877) or NO EMBOSSING Pat'd 1871 1988 [NRW88]
CD 158.2   Telegraph         BOSTON BOTTLE WORKS (1871-1877) or NO EMBOSSING 1973 [GIaCR]
CD 158.9   Telegraph Screw Top Boston 1871 1877   Unique to BOSTON BOTTLE WORKS (1871-1877) 1973 [GIaCR]
CD 159   Telegraph Gregory 1903     Unique to GREGORY Pat'd 1903 1976 [Mil76]
CD 160 Double Petticoat Pony Telephone Baby Signal 1889 1957~     1967 [NRW67]
CD 160.4                
CD 160.6   Telephone Pilgram Hat 1885> 1915<   Unique to AM.TEL.& TEL.CO. (1885-1915) 1973 [GIaCR]. 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 [NRW69]
CD 161.2   Secondary   1869> 1921<   Unique to BROOKFIELD (1869-1921) 1976 [Mil76]
CD 162 Deep Groove Double Petticoat Secondary Signal 1890~ 1942 Per N.R. Woodward on Hemingray Started in the late 1880s 1967 [NRW67]
CD 162.05               1979 [MilSPG79]. Not in McDougald's
CD 162.1   Secondary         STAR ¥ or BROOKFIELD (1869-1921) 1976 [Mil76]
CD 162.2               1979 [MilSPG79]. Not in McDougald's
CD 162.3   Secondary         STAR ¥ or BROOKFIELD (1869-1921) 1976 [Mil76]
CD 162.4   Secondary         NO NAME or NO EMBOSSING Canadians 1973 [GIaCR]
CD 162.5 P.R.R. Telegraph         P.L.W. or P.R.R. 1969 Originally CD 462. [NRW69]
CD 162.6               1979 [MilSPG79]. Not in McDougald's
CD 162.7   Telegraph         Various Mexican only 1976 [Mil76]
CD 163   Secondary           1967 [NRW67]
CD 163.2   Secondary         Unique to NO NAME 1988 [NRW88]
CD 163.4             Unique to WHITALL TATUM ¸ (1922-1946) 1999 [McDPG99]
CD 164 Extra Deep Groove DP Secondary   1912< 1912>     1967 [NRW67]
CD 164.4   Secondary   1920 1930   Unique to NO EMBOSSING (FRY 1920-1930) 1973 [GIaCR]
CD 165   Secondary   1870> 1967<   Unique to HEMINGRAY (1865-1970) 1967 [NRW67]
CD 165.1   Secondary   1922> 1946<   Unique to WHITALL TATUM ¸ (1922-1946) 1973 [GIaCR]
CD 166   Secondary   1912 1916   Unique to CALIFORNIA (1912-1916) 1969 [NRW69]
CD 166.2   Secondary         E.L.CO. (1890-1910) or NO EMBOSSING 1973 [GIaCR]
CD 167   Secondary   1946   Per N.R. Woodward on Whitall Tatum ARMSTRONG Á (1946-1969) or NO NAME 1967 [NRW67]
CD 168   Secondary         WHITALL TATUM ¸ (1922-1946) or HEMINGRAY (1865-1970) 1967 [NRW67]
CD 168.5             Unique to NO NAME 1976 [Mil76]
CD 168.6                
CD 169   Secondary         WHITALL TATUM ¸ (1922-1946) or HEMINGRAY (1865-1970) 1969 [NRW69]
CD 169.5   Telegraph   1869> 1921<   Unique to BROOKFIELD (1869-1921) 1976 [Mil76]
CD 170   Secondary         Unique to NO EMBOSSING 1969 [NRW69]
CD 170.1   Secondary         Unique to NO EMBOSSING 1973 [GIaCR]
CD 170.4               1979 [MilSPG79]. Not in McDougald's
CD 171 Telegraph or Heavy Telegraph Telegraph             Never Officially Assigned
CD 172 Small Deep Groove Double Petticoat Secondary             Never Officially Assigned
CD 173   Secondary   1912< 1921<   Unique to BROOKFIELD (1869-1921) 1967 [NRW67]
CD 174 Wide Groove DP Secondary   1912< 1921<   Unique to BROOKFIELD (1869-1921) 1967 [NRW67]
CD 174.5                
CD 175   Secondary Door Knob 1870> 1967<   Unique to HEMINGRAY (1865-1970) 1967 [NRW67]
CD 175.5                
CD 176 Carrier Telephone Mushroom 1929     Unique to WHITALL TATUM ¸ (1922-1946) Pat'd 1929 1976 [Mil76]
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>     1967 [NRW67]
CD 178.5       1915>     Unique to LOCKE (1892-). Only embossing includes 1915 Patent date. 1995 [McDPG95]
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 [Mil76]
CD 180.1     Fluid Insulator 1894<     Unique to FLUID INSULATOR old style as of 1894 Pat 1990 [McD]. Now CD 180.5
CD 180.5     Fluid Insulator 1894<       1999 [McDPG99]
CD 181     Pluto       Unique to NO EMBOSSING 1973 [GIaCR]
CD 181.5     Spaceman       Unique to NO EMBOSSING 1995 [McDPG95]
CD 182 Dry Spot Telegraph Dry Spot 1929 1946<   Unique to DRY SPOT INSULATOR Whitall Tatum (1922-1946) Pat'd 1929 1976 [Mil76]
CD 183   Primary   1870> 1967<   Unique to HEMINGRAY (1865-1970) 1967 [NRW67]
CD 184     Climax 1869> 1921<   Unique to CLIMAX Brookfield (1869-1921) dump item 1990 [McD]
CD 185 Mine Insulator   Mine Insulator 1912< 1912>     1967 [NRW67]
CD 185.2             Unique to B.E.L.CO. 1976 [Mil76]
CD 186   Spark Gap Insulator   1940 1940 [4] Unique to HEMINGRAY (1865-1970) 1976 [Mil76]
CD 186.1   Spark Gap Insulator   1940 1940 [4] Unique to HEMINGRAY (1865-1970) 1976 [Mil76]
CD 186.2   Spark Gap Insulator Nut 1940 1940 [4] Unique to HEMINGRAY (1865-1970) 1976 [Mil76]
CD 187 Brown Pony Telephone Duplex 1912< 1912>     1967 [NRW67]
CD 188 Brown Deep Groove   Duplex 1912< 1912>     1967 [NRW67]
CD 189                 Never Officially Assigned
CD 190/191 Hibbard Transposition Telephone Two Piece Tramp 1886> 1912>     1967 [NRW67]
CD 192.1/193.1     Two Piece Tramp 1886>     AM.TEL.& TEL.CO. (1885-1915) or NO EMBOSSING 1988 [McD] 192.1 / [Mil76] 193.1
CD 192/193 Hibbard Transposition Telephone Two Piece Tramp 1886>     AM.TEL.& TEL.CO. (1885-1915) or NO EMBOSSING 1976 [Mil76]
CD 194.5/195.5     Two Piece Tramp 1930 1941<   Unique to PYREX (1924-1941) Pat'd 1930 1990 [McD]
CD 194/195 Transposition Telephone Two Piece Tramp 1886> 1967<   Unique to HEMINGRAY (1865-1970) 1969 [NRW69]
CD 196 Perfect Transposition Telephone Tramp 1886> 1912>     1967 [NRW67]
CD 196.2     Tramp 1883> 1910< (1893-1910 per Bob Stahr note) Unique to H.G.CO. 1990 [McD]
CD 196.5     Tramp 1883> 1910< (1893-1910 per Bob Stahr note) Unique to H.G.CO. 1990 [McD]
CD 197 Transposition Telephone Tramp 1886>     WHITALL TATUM ¸ (1922-1946) or HEMINGRAY (1865-1970) 1967 [NRW67]
CD 198       1886>         Never Officially Assigned
CD 199 Transposition Telephone Tramp 1902 1903   Unique to PRISM ¬ (1902-1903) 1973 [GIaCR]
CD 200 Transposition Telephone Tramp 1900~ 1915~ [5] STAR ¥ CALIFORNIA (1912-1916) or NO NAME 1967 [NRW67]
CD 201 Transposition Telephone Tramp 1886>     HEMINGRAY (1865-1970) CALIFORNIA (1912-1916) or H.G.CO. 1967 [NRW67]
CD 202 Transposition Telephone Tramp 1896 1912> Per Locke biography   1967 [NRW67]
CD 203 Transposition Telephone Tramp 1946   Per N.R. Woodward on Whitall Tatum   1967 [NRW67]
CD 203.2 Transposition Telephone Tramp 1956 1969<   Unique to ARMSTRONG Á (1946-1969) Pat'd 1956 1976 [Mil76]
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 [GIaCR]
CD 205 Transposition Telephone or Secondary Tramp 1886> 1912>     1967 [NRW67]
CD 205.5 Large Double Groove DP     1886>     Unique to NO EMBOSSING 1988 [NRW88]
CD 206   Telephone Castle       Unique to NO EMBOSSING 1969 [NRW69]
CD 206.5   Telephone Claw 1902 1906   Unique to HARLOE » (1902-1906) 1979 [MilSPG79]
CD 207       1900 1921<   Unique to B Pat'd 1900 1973 [GIaCR]
CD 207.5                
CD 208 Top Groove Telephone Telephone Top Groove Hot Cross Bun 1890>       1967 [NRW67]
CD 209       1890>   GIFONA -- Chilean piece.     GIFONA
CD 210 Standard Postal Telegraph Telegraph   1917     POSTAL or NO EMBOSSING Pat'd 1917 1967 [NRW67]
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 [GIaCR]
CD 212       1890>         Never Officially Assigned
CD 213 Top Groove Western Union Telegraph   1890> 1967<   Unique to HEMINGRAY (1865-1970) 1967 [NRW67]
CD 214   Telegraph   1890>       1967 [NRW67]
CD 215       1890>         Never Officially Assigned
CD 216   Primary   1890>       1967 [NRW67]
CD 217   Primary   1946> 1969<   Unique to ARMSTRONG Á (1946-1969) 1967 [NRW67]
CD 218   Primary   1890> 1967<   Unique to HEMINGRAY (1865-1970) 1976 [Mil76]
CD 219   Primary   1890>     HEMINGRAY (1865-1970) or NO EMBOSSING 1967 [NRW67]
CD 220   Primary   1890> 1967<   Unique to HEMINGRAY (1865-1970) 1967 [NRW67]
CD 220.1             1979 [MilSPG79]. Not in McDougald's
CD 221   Primary   1890>     WHITALL TATUM ¸ (1922-1946) or HEMINGRAY (1865-1970) 1967 [NRW67]
CD 222 Small Top Groove Double Petticoat 5 000v   1890>         Never Officially Assigned
CD 223 High Voltage Double Petticoat 7 500v   1890>         Never Officially Assigned
CD 224 High Voltage Double Petticoat 10 000v   1890>         Never Officially Assigned
CD 225   5 000v   1890> 1921<   Unique to BROOKFIELD (1869-1921) 1967 [NRW67]
CD 226   5 000v   1890> 1912>   Unique to NO NAME 1967 [NRW67]
CD 226.3   Primary   1903> 1921<   Unique to B 1988 [NRW88]
CD 227 Large Groove Double Petticoat 5 000v   1890> 1912>       Never Officially Assigned
CD 228   10 000v   1890> 1921<   Unique to BROOKFIELD (1869-1921) 1967 [NRW67]
CD 228.5   Primary   1946> 1969<   Unique to ARMSTRONG Á (1946-1969) 1988 [NRW88]
CD 229 Top Groove Double Petticoat 3 000v   1890> 1912>       Never Officially Assigned
CD 229.6   Primary   1920 1930   Unique to NO EMBOSSING (FRY 1920-1930) 1988 [NRW88]
CD 230   6 600v Frog Eyes 1890>       1967 [NRW67]
CD 230.1   6 600v   1890> 1967<   Unique to HEMINGRAY (1865-1970) 1976 [Mil76]
CD 230.2   6 600v   1946> 1969<   Unique to ARMSTRONG Á (1946-1969) 1976 [Mil76]
CD 231   Primary   1951   1951 start per N.R. Woodward KIMBLE (1952-1970) or HEMINGRAY (1865-1970) 1976 [Mil76]
CD 231.2   Primary   1952> 1970<   Unique to KIMBLE (1952-1970) 1973 [GIaCR]
CD 232   11 000v   1890> 1967<   Unique to HEMINGRAY (1865-1970) 1967 [NRW67]
CD 232.1   11 000v   1890> 1967<   Unique to HEMINGRAY (1865-1970) 1973 [GIaCR]
CD 232.2       1890>        
CD 233   6 600v   1926 1912>   Per McDougalds 1967 [NRW67]
CD 233.2       1890> 1967<   Unique to HEMINGRAY (1865-1970) 1990 [McD]
CD 234   8 000v   1924> 1941<   Unique to PYREX (1924-1941) 1967 [NRW67]
CD 234.5       1890>        
CD 235   8 000v   1926 1941< Start date per McDougalds. Unique to PYREX (1924-1941). 1967 [NRW67]
CD 236   Primary   1890> 1921<   Unique to BROOKFIELD (1869-1921) 1976 [Mil76]
CD 237   13 500v   1890> 1967<   Unique to HEMINGRAY (1865-1970) 1967 [NRW67]
CD 238   Primary   1890> 1967<   Unique to HEMINGRAY (1865-1970) 1967 [NRW67]
CD 238.1       1890> 1967<   Unique to HEMINGRAY (1865-1970) 1995 [McDPG95]
CD 238.2       1946> 1969<   Unique to ARMSTRONG Á (1946-1969) 1990 [McD]
CD 238.6       1890>        
CD 239   Primary   1951   1951 start per N.R. Woodward KIMBLE (1952-1970) or HEMINGRAY (1865-1970) 1967 [NRW67]
CD 239.2   Primary   1952> 1970<   Unique to KIMBLE (1952-1970) 1976 [Mil76]. Not listed in Woodward's 1988 Report
CD 240   13 500v   1927 1941< Start date per McDougalds. Unique to PYREX (1924-1941). 1967 [NRW67]
CD 240.2   Primary   1890>     NO NAME or NO EMBOSSING 1976 [Mil76]
CD 240.5   Primary   1926 1941< Start date per McDougalds. Unique to PYREX (1924-1941). 1976 [Mil76]
CD 241   6 600v   1916~ 1967< Start date per Locke biography Unique to HEMINGRAY (1865-1970). 1967 [NRW67]
CD 241.2   6 600v   1890> 1967<   Unique to HEMINGRAY (1865-1970) 1976 [Mil76]
CD 242   10 000v   1890> 1967<   Unique to HEMINGRAY (1865-1970) 1967 [NRW67]
CD 243   15 000v   1890> 1967<   Unique to HEMINGRAY (1865-1970) 1967 [NRW67]
CD 244     Pomona or Crosstop 1892~ 1895~   Unique to NO EMBOSSING Line construction use from ~1892 to 1895 1976 [Mil76]
CD 244.5       1890>     Unique to GREELEY 1990 [McD]
CD 245   Primary   1890> 1892   Unique to T-H. (1883-1892) 1973 [GIaCR]
CD 245.2       1890>        
CD 246 High Voltage Double Petticoat 10 000v   1890>         Never Officially Assigned
CD 247   Primary   1890>     Unique to NO EMBOSSING 1976 [Mil76]
CD 247.3       1890>        
CD 248/311/311 Montana 15 000v Montana or Stacker 1890>     HEMINGRAY (1865-1970) or PYREX (1924-1941) 1967 [NRW67]
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 [Mil76]
CD 250   Cable   1899 1899   Unique to N.E.G.M.CO. (1899) 1969 [NRW69]
CD 250.2   Telephone   1890>     Unique to ERICSSON 1976 [Mil76]
CD 251   Cable   1890> 1912>     1967 [NRW67]
CD 252 Knowles Cable Cable   1890> 1912>     1967 [NRW67]
CD 253 Knowles Cable Cable   1900 1903   Unique to KNOWLES (1900-1903) 1976 [Mil76]
CD 254 Knowles Cable Cable   1890> 1912>     1967 [NRW67]
CD 255   Cable   1890>   Woodward's 1988     Never Officially Assigned
CD 256 Manhattan Cable Cable Manhattan 1890>     Unique to MANHATTAN 1969 [NRW69]
CD 257   Cable Mickey Mouse 1890>     HEMINGRAY (1865-1970) or PATENT - OTHER 1967 [NRW67]
CD 258   Cable Roman Helmet 1890>     Unique to CABLE 1976 [Mil76]
CD 259   Cable Roman Helmet 1890> 1912>     1967 [NRW67]
CD 260   Cable Roman Helmet 1890>       1969 [NRW69]
CD 261       1890>         Never Officially Assigned
CD 262 Columbia Single Petticoat Cable Baby Columbia 1890> 1912>   Unique to COLUMBIA 1967 [NRW67]
CD 263 Columbia Cable Columbia 1890> 1912>     1967 [NRW67]
CD 264 Columbia Cable Columbia 1890>     Unique to COLUMBIA 1976 [Mil76]
CD 265 Fisher Third Rail Fisher 1883> 1888~   FISHER or NO EMBOSSING Electric railway developed mid 1880s in use 'till 1888 1973 [GIaCR]
CD 265.1                
CD 266 Boston Cable Cable Boston Cable 1890>     Unique to PATENT - OTHER (1890 Date) 1967 [NRW67]
CD 267 Boston Cable Cable   1890> 1912>     1967 [NRW67]
CD 267.5   Cable Straight Sides 1899 1899   Unique to N.E.G.M.CO. (1899) 1976 [Mil76]
CD 268 Crown Cable Crown 1895 1912>   Unique to THE CROWN Pat'd 1895 1967 [NRW67]
CD 268.5   Cable   1893 1894   Unique to STANDARD (1893-1894) 1976 [Mil76]
CD 269 New Jumbo Cable Eared Jumbo 1890> 1912>   OAKMAN MFG.CO. (1890-1897) or JUMBO 1967 [NRW67]
CD 270   Cable   1890>     Unique to NO EMBOSSING 1976 [Mil76]
CD 271       1890>        
CD 272   6 600v   1890> 1912>     1967 [NRW67]
CD 273   5 000v   1890> 1912>   Unique to NO EMBOSSING 1967 [NRW67]
CD 274 High Voltage Double Petticoat 11 000v   1890>         Never Officially Assigned
CD 275   10 000v   1890> 1912>   LOCKE (1892-) or NO NAME 1967 [NRW67]
CD 276       1890>         Never Officially Assigned
CD 277 Extra Large Top Groove Double Petticoat 6 600v   1890>         Never Officially Assigned
CD 278       1890>         Never Officially Assigned
CD 279       1890>         Never Officially Assigned
CD 280   Primary           1967 [NRW67]
CD 281   10 000v         HEMINGRAY (1865-1970) or LYNCHBURG ¨ (1923-1925) 1967 [NRW67]
CD 282 Provo 13 200v Provo 1897   Included in 1897 Electrical Appliance Catalog   1967 [NRW67]
CD 283 Provo 15 000v Provo 1897   Included in 1897 Electrical Appliance Catalog   1967 [NRW67]
CD 284 Floy 11 000v   1912< 1912>   Unique to FLOY 1967 [NRW67]
CD 285 4-inch Edison   Edison 1892     Unique to NO EMBOSSING Pat'd 1892 1967 [NRW67]
CD 286       1892>     Unique to LOCKE (1892-) 1976 [Mil76]
CD 286.9       1886> 1898<   Unique to WESTINGHOUSE (1886-1898) 1990 [McD]
CD 287   10 000v   1895 1912> Start date per Locke biography   LOCKE (1892-) or NO NAME. NO NAME manufactured by Brookfield. 1967 [NRW67]
CD 287.1       1894 1895 Dates per Locke biography. Unique to LOCKE (1892-). Manufactured by Brookfield. 1976 [Mil76]
CD 287.2       1891 1894 Dates per Locke biography Unique to BROOKFIELD (1869-1921). 1973 [GIaCR]
CD 288 Mershon 12 000v Mershon 1912< 1912>     1967 [NRW67]
CD 289   18 000v   1912< 1912>   LOCKE (1892-) or NO EMBOSSING 1967 [NRW67]
CD 289.9       1889 1893 Dates per Locke biography. Unique to PATENT - OTHER Pat'd 1889. 1990 [McD]
CD 290       1890>         Never Officially Assigned
CD 291       1890>     HEMINGRAY (1865-1970) or NO NAME 1976 [Mil76]
CD 292 Lachine Triple Petticoat Primary   1890>       1967 [NRW67]
CD 292.5       1900 1903   Unique to KNOWLES (1900-1903) 1976 [Mil76]
CD 293   Primary   1897     Unique to LOCKE (1892-) 1976 [Mil76]
CD 293.1   Primary   1892>     Unique to LOCKE (1892-) 1988 [NRW88]
CD 294       1899 1899   Unique to N.E.G.M.CO. (1899) 1976 [Mil76]
CD 295   10 000v   1890> 1967<   Unique to HEMINGRAY (1865-1970) 1967 [NRW67]
CD 296   10 000v   1890> 1912>     1967 [NRW67]
CD 297   15 000v   1890> 1912>     1967 [NRW67]
CD 298     Ballerina 1890>     Unique to NO EMBOSSING 1976 [Mil76]
CD 299   11 000v   1890> 1921<   Unique to BROOKFIELD (1869-1921) 1967 [NRW67]
CD 299.1   10 000v   1902 1903   Unique to PRISM ¬ (1902-1903) 1976 [Mil76]
CD 299.2   Primary   1920 1930   Unique to NO EMBOSSING (FRY 1920-1930) 1976 Originally CD 315.5? [Mil76]. Not listed in 1979 Price Guide
CD 299.7       1890>        
CD 300   20 000v   1890> 1912>   LOCKE (1892-) or BROOKFIELD (1869-1921) 1967 [NRW67]
CD 301       1890>     Unique to NO EMBOSSING 1976 [Mil76]
CD 301.2   Primary   1920 1930   Unique to NO EMBOSSING (FRY 1920-1930) 1988 [NRW88]
CD 301.5       1890> 1967<   Unique to HEMINGRAY (1865-1970) 1976 [Mil76]. Not listed in Woodward's 1988 Report
CD 302 7-inch Muncie 15 000v Muncie 1890> 1967<   Unique to HEMINGRAY (1865-1970) 1967 [NRW67]
CD 303.5     Provo 1890> 1967<   Unique to HEMINGRAY (1865-1970) 1990 [McD]
CD 303/310 9-inch Muncie 20 000 Muncie 1890> 1967<   Unique to HEMINGRAY (1865-1970) 1967 [NRW67]
CD 304/310     Coolie Hat 1890>     HEMINGRAY (1865-1970) or NO EMBOSSING 1976 [Mil76]. Not listed in 1979 Price Guide
CD 305 Small Top Groove Triple Petticoat 7 500v   1890>         Never Officially Assigned
CD 306       1923 1925   Unique to LYNCHBURG ¨ (1923-1925) 1973 [GIaCR]
CD 307   10 000v Viking Helmet 1890> 1967<   Unique to HEMINGRAY (1865-1970) 1967 [NRW67]
CD 308 Cable 6 600v Viking Helmet 1890> 1912>   NO EMBOSSING or NO NAME 1967 [NRW67]
CD 309     Beal's 1899     Unique to BEAL'S Pat'd 1899 1990 [McD]
CD 309.5       1886> 1898<   Unique to WESTINGHOUSE (1886-1898) 1990 [McD]
CD 310                
CD 311                
CD 312             Unique to NO EMBOSSING 1990 [McD]. Previously sleeve to CD 249 has been dropped in 2003 PG.
CD 313             Unique to NO EMBOSSING 1990 [McD]
CD 313.1             Unique to NO EMBOSSING 1990 [McD]
CD 314             Unique to NO EMBOSSING 1990 [McD]. Previously sleeve to CD 317.7 has been dropped in 2003 PG.
CD 315 Type HG     1902 1903   Unique to PRISM ¬ (1902-1903) 1967 [NRW67]
CD 315.5               1979 [MilSPG79]. Not in McDougald's
CD 316   7 500v   1890> 1921<   Unique to BROOKFIELD (1869-1921) 1967 [NRW67]
CD 316.5               1979 [MilSPG79]. Not in McDougald's
CD 317   Lightning Rod Candlestick or Bell Chambers 1877>     Unique to CHAMBERS Pat'd 1877 1973 [GIaCR]
CD 317.5   Lightning Rod   1877>     Unique to CHAMBERS Pat'd 1877 1973 [GIaCR]
CD 317.7       1883> 1910< (1893-1910 per Bob Stahr note) Unique to H.G.CO. 1990 [McD]
CD 317.8/313/313/313.1       1902     Unique to PATENT - OTHER Pat'd 1902 1990 [McD]
CD 317.9             Unique to NO EMBOSSING 1976 [Mil76]
CD 318 Niagara High Potential 20 000v   1892> 1912>   Unique to LOCKE (1892-) 1967 [NRW67]
CD 319 Special High Potential 21 000v   1892> 1912>   Unique to LOCKE (1892-) 1967 [NRW67]
CD 320   17 000v   1924> 1941<   Unique to PYREX (1924-1941) 1967 [NRW67]
CD 321     Bat Ears 1902 1903   PRISM ¬ (1902-1903) or PATENT - OTHER 1969 [NRW69]
CD 322   23 000v   1927 1941< Start date per McDougalds. Unique to PYREX (1924-1941). 1967 [NRW67]
CD 323   30 000v   1926 1941< Start date per McDougalds. Unique to PYREX (1924-1941). 1967 [NRW67]
CD 324   35 000v   1932 1941< Start date per McDougalds. Unique to PYREX (1924-1941). 1967 [NRW67]
CD 325   40 000v   1926 1941< Start date per McDougalds. Unique to PYREX (1924-1941). 1967 [NRW67]
CD 326   45 000v   1932 1941< Start date per McDougalds. Unique to PYREX (1924-1941). 1967 [NRW67]
CD 327   50 000v   1926 1941< Start date per McDougalds. Unique to PYREX (1924-1941). 1967 [NRW67]
CD 328   55 000v   1932 1941< Start date per McDougalds. Unique to PYREX (1924-1941). 1967 [NRW67]
CD 328.2       1924> 1941<   Unique to PYREX (1924-1941) 1995 [McDPG95]
CD 329                 Never Officially Assigned
CD 330   66 000v   1932 1941< Start date per McDougalds. Unique to PYREX (1924-1941). 1967 [NRW67]
CD 331   70 000v   1930 1941< Start date per McDougalds. Unique to PYREX (1924-1941). 1967 [NRW67]
CD 332                 Never Officially Assigned
CD 333       1902 1903   Unique to PRISM ¬ (1902-1903) 1973 [GIaCR]
CD 338   16 000v   1890> 1921<   Unique to BROOKFIELD (1869-1921) 1967 [NRW67]
CD 342   25 000v   1892>     Unique to LOCKE (1892-) 1967 [NRW67]

References

  • [GIaCR] Cranfill, Gary & Kareofelas, Greg (1973). The Glass Insulator A Comprehensive Reference.
  • [MilSPG79] Keating, Paul (1979). Milholland's Suggested Insulator Price Guide.
  • [McD] McDougald, John & Carol (1990). Insulators A History and Guide to North American Glass Pintype Insulators.
  • [McDPG95] McDougald, John & Carol (1995). Price Guide to North American Pintype Insulators.
  • [McDPG99] McDougald, John & Carol (1999). Price Guide to North American Pintype Insulators.
  • [McDPG03] McDougald, John & Carol (2003). Price Guide to North American Pintype Insulators.
  • [Mil76] Milholland, Marion (1976). Most About Glass Insulators Bicentennial Edition.
  • [NRW67] Woodward, N.R. (1967). The Glass Insulator in America 1967 Report.
  • [NRW69] Woodward, N.R. (1969). The Glass Insulator in America 1969 Report.
  • [NRW88] Woodward, N.R. (1988). The Glass Insulator in America 1988 Report.

General Dating Rules

  • 1886> typically indicates a start date based on the origin of transposition theory
  • 1890> typically indicates a start date based on the saddle groove patent
  • 1912> or 1912< typically indicates the CD appeared in the Brookfield 1912 Catalog


Notes

  1. CD 102.4 a product of the Lyndeborough Glass Company, South Lyndeboro, New Hampshire (1866-1888). Many shards have been found by a digger at the old glassworks site. Per David Whitten, 10/12/2009 email.
  2. "The CD 106 Hemingray-9 was introduced in either 1892 or 1893 and continued in production until at least the early 1950's (my example is 1951) until replaced by the CD 107 Hemingray-9 in 1956." Per Bob Stahr, 09/12/2007 email on ICON.
  3. Per N.R. Woodward on Hemingray
  4. 4.0 4.1 4.2 CD 186, 186.1, and 186.2 are experimental Hemingray pieces made in 1940. See http://www.insulators.info/pictures/?id=120222643
  5. CD 200 Insulator of the Week 27 Dec 2007. http://www.insulators.info/wiki/IOTW_CD_200
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