GEC
KEYPHONE 81 / TEL/81P

G.E.C. KEYPHONE 81 or TEL/81P
For Loop Disconnect Signalling

 This telephone is a 10 pulses per second (LD), self-contained, table keyphone based on Telephone No. 746.

It has an integral battery.

The British Post Office used a modified version of this telephone as their Telephone SA 4274.

Rear view of press button unit

Last revised: August 26, 2025