G.P.O. Insulator, No. 21

This insulator is used at the lower end of an arrangement to bring a pair of open wires down a high building to a lower point where they can terminate on the lead-in cable at a convenient height for fault finding. The upper point uses the Insulator No. 10 also with side knobs.

Unfortunately these specimens and their bracket have been painted to match the woodwork.

RingBell : GPO Nostalgia Web site