Bakelite cased wall telephone, introduced in 1956 and used by the BPO in C.B. and Automatic exchange areas on direct exchange lines.  This telephone includes an AC bell ringer.

Offered as an alternative to the table model, Telephone No. 232 and Telephone No. 332.

This model had no provision for additional push buttons.

It is fixed to the wall, on 4 rubber mounts, by wood screws.

Produced in Black, Chinese Red, Ivory and Jade Green.

Made for the BPO by British Ericsson, their models:-
Telephone No. 333CB - Model N1432A1.
Telephone No. 333L - Model N1086A2.
Telephone No. 333F - Model N1086A1.

Telephone Includes (1955):-
1 x Bell No. 59A, Unmounted.
1 x Bell-gong No. 2.
1 x Bell-gong No. 2A Nickeled.
1 x Coil, Induction No. 27.
1 x Condenser, M.C. No. 97.
1 x Cord, Instrument No. 5/28E, 5" (for Dials, Automatic only).
1 x Dial, Automatic S.S., No. 12LA & FA ... or Dummy No. 3 (Colour).
1 x Part No. 1/SCA/17 (Colour).
1 x Telephone No. 164 (Colour).

Circuit diagram - N433.

Drawing No. 90696.

Diagram for Button labels - N620.

History, Technical and General Information on 300 type telephones

Development of the Bakelite Wall Telephone

Collectors information

How to wire your Telephone No. 333 to make it work on Plug and Socket

How to restore Bakelite

Keys for use in 300 type Wall and Table Telephones

Adjustment of Magneto bells

Comparison chart of GPO 300 type telephones

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Last revised: November 20, 2021