Wall mounted wooden dial telephone, used on extension plans in Automatic exchange areas.  Many are seen on a backboard with a writing shelf called a Desk No. 4.

Similar to the Telephone No. 77 except for the capacitor wire had been repositioned and the Telephone No. 105 is fitted with Dial, Automatic, No. 8.

Supersedes Telephone No. 55.

Superseded by the Telephone No. 121.

Telephone includes (1928):-
1 x Bell No. 1A, unmounted, with bias spring.
1 x Coil, Induction, No. 14.
1 x Condenser, M.C., No. 30.
2 x Cords, Instrument, No. 116.
1 x Cord, Instrument, No. 222, waterproof.
1 x Dial, Automatic, No. 8FA.
1 x Hook, Receiver, F.
1 x Mounting, Dial, Automatic, No. 7.
1 x Switch, Receiver, No. 2.
1 x Transmitter No. 1.
1 x Receiver, Bell, No. 1A.

Desk No. 4 to be requisitioned separately when required.

Circuit diagram - N205.
Diagram - A.T. 753.

The picture is dated 1925.

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Last revised: March 06, 2021