CENTRAL BATTERY TELEPHONES
No. U 706
Central Battery Wall Telephone, comprising:
Solid back Granular Carbon
Transmitter with Adjustable Knuckle Joint 1000 ohm Polarised Call Bell, with nickel plated Bell Metal Gongs and Guard to protect
the Hammer, removable Automatic Switch-Hook, Induction Coil, Condenser, Concealed Line Terminals, Double Pole Bell Receiver in
Enamelled Drawn Brass Case, with Enclosed Terminals, and Flexible Cord.
External Parts Nickel plated and Polished Solid Walnut.
Taken from the Sterling Catalogue No. 11 & 12