Rubber Continental Rubber Works

R-4 CONTINENTAL / RUBBER WORKS // W.U. TEL.CO./PAT 2,218,497 [Embossed on dome]

Continental Rubber Work's insulators have been used extensively from the 1930's to the 1970's as replacement for glass pintype insulators. They are especially common where damage to glass by hunters and rocks is extensive, as they are nearly indestructible. This is a standard style intended for a wood pin.

Black . . . . . . . . . . . . . . . . $1