Duplex Pole: JFD Porcelain
3 3/8" X 2 1/8" (87mm X 54mm)
(top embossed) SET / ANT SET / ANT (side embossed) UHF-VHF TV LIGHTNING ARRESTER AT-120 JFD MFG. CO. INC. B'KLYN, N.Y. |
4 1/2" X 1 3/8" (115mm X 35mm)
Picture courtesy Jim Fielding |
This duplex version was used to connect two antenna wires to ground. This is light green dry process porcelain intended for television antenna protection.