A glass telephone wire insulator, with screw groves inside where you can screw the wood peg into. there are markings on the side that read "DOMINION - 16" as well as the number "48" inside near the top.
A glass telephone wire insulator, with screw groves inside where you can screw the wood peg into. there are markings on the side that read "DOMINION - 16" as well as the number "48" inside near the top.