TELEPHONE No. 333

Bakelite cased wall telephone, introduced in 1956 and used by the BPO in C.B. and Automatic exchange areas on direct exchange lines. The C.B. variant was fitted with a Dial, Automatic, Dummy No. 3.

The handset is a Telephone No. 164.

This telephone includes an AC bell ringer.

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

The case and all internal components are mounted on a plate. This plate is fixed to the wall, by means of 4 rubber mounts, using wood screws.

The case was fixed by a single screw next to the handset cord entry. The case had a flexible cloth type strap that fixed to the back plate allowing the case to hang during maintenance work.

To remove the case, release the lower fixing screw adjacent to the handset cord entry point. Pull the bottom of the case outwards about one inch and then lift the case upwards to release the top fixings.

This model had no provision for any push buttons keys. If push button keys were required then a Telephone No. 321 would be supplied.

Produced in the colours; Black, Chinese Red, Ivory and Jade Green.

This telephone superseded the Telephone No. 221 in 1956.

Superseded by the Telephone No. 711 in 1964.

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

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, Stainless Steel No. 12LA or 12FA ... or Dummy No. 3 (Colour).
1 x Part No. 2/DCA/89 (Colour).
1 x Telephone No. 164 (Colour).

The case is a Part 2/DCA/89 (ETL part number N82761).

Circuit diagram - N433.

Drawing No. 90696.

Specification - S77.

How to wire your Telephone No. 333 to make it work on Plug and Socket
300 Type telephone circuit description
Dismantling the Handset
History, Technical and General Information on 300 type telephones
Development of the Bakelite Wall Telephone
Collectors information
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