CD 185
JEFFREY MFG.CO.
[020] (F-Above wire groove) SPECIAL MINE INSULATOR/JEFFREY MFG.CO. (F-Skirt) COLUMBUS OHIO/PATENT SEPT 25 1894 {Drip points may be on the top or on the bottom of the insulator} SDPAqua . . . . . . . . . . . . . . $250-300
A mine insulator made by Hemingray; harder to come by than the HEMINGRAY-95 embossing. This one has the drip points on top and the pinhole goes all the way through.