TELEPHONE No. 310


Introduced in 1947, this Bakelite cased, combined table handset telephone was used by the BPO in Automatic exchange areas with a Bellset No. 41 on shared service separate metering lines.

The case has provision for one press button only and was supplied with a label stating "Call Exchange".

Mark 1 - has a Receiver, Inset No. 1L in the handset and switch bracket with plungers of the early type.
Mark 1A - has a Receiver, Inset No. 1L in the handset and switch bracket with plungers of an improved type.
Mark 2 - has a Receiver, Inset No. 2P in the handset and switch bracket with plungers of the early type.
Mark 2A - has a Receiver, Inset No. 2P in the handset and switch bracket with plungers of an improved design.

Superseded by the Telephone No. 312 in 1949.

The wall equivalent is the Telephone No. 311.

Made By Ericsson, model N1003M1

Picture by Paul Follet.

Telephone Includes (1956):-
1 x Bell No. 59A, Unmounted.
1 x Bell-gong No. 2.
1 x Bell-gong No. 2A Nickelled.
1 x Block, Terminal No. 20/8, Black.
1 x Capacitor, M.C. No. 97.
1 x Coil, Induction No. 27.
1 x Cord, Instrument No. 5/14B, Brown.
1 x Cord, Instrument No. 5/28E, 5".
1 x Dial, Automatic No. 12 ...
1 x Key No. 302B.
1 x Part No. 2/SCA/20, Black.
1 x Telephone No. 164, Black.
1 x Tray, D62076 Black.

Diagram for telephone circuit - N410.

Diagram for Button labels - N620.

Drawing No. 63022 - Telephone components parts.
Drawing No. 63023 - Chassis components.
Drawing No. 63250 - Chassis components (improved switch hook buttons).
Drawing No. 90319 - Telephone parts (Mk 3A).
Drawing No. 90373 - Chassis components (improved switch hook buttons).
Drawing No. SBA12 - 300 type base plate.
Drawing No. SCA17 - 300 type complete case.
Drwaing No. SCA20 - 300 type case.
Drawing No. SCA47 - 300 type complete case (improved switch hook buttons).

How to wire your Telephone No. 310 to make it work on Plug and Socket

Dismantling the Telephone No. 310

Dismantling the Handset

History, Technical and General Information on 300 type telephones

Collectors information

Adjustment of Magneto bells

Keys for use in 300 type wall and table telephones

Lamp Fittings

Labels that fit in the sliding tray

General fault finding on your phone

How to restore Bakelite

Comparison chart of GPO 300 type telephones

Some models made by British Ericsson, their model N1003B

 

Internal View of the Telephone No. 310

Note the Telephone Number and date between the bell gongs


 
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Last revised: April 22, 2022

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