TELEPHONE No. 308


Introduced in 1939 this combined table handset telephone was used by the BPO in CB and Automatic exchange areas.

The case and handset are made of Bakelite.  The handset is actually called a Telephone No. 164.

This telephone has a magneto bell and provision in the case moulding for three press buttons.

Used on extension plans that require an additional gravity springset and more that one press button.

Early models may be found with a Coil, Induction No. 22 fitted instead of a Coil, Induction No. 27.

Spring 1 of the cradle switch is spring-set is adjacent to the mounting.

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.

Telephone includes (1946):-
1 x Bell No. 59A, Unmounted.
1 x Part No. 3/SCA/17, Black.
1 x Bell-gong No.2, Nickelled.
1 x Bell-gong No.2A, Nickelled.
1 x Capacitor, M.C. No. 97.
1 x Telephone No. 164, Black.
1 x Coil, Induction No. 27.
1 x Tray, D 62076, Black or Tray, D1/62833, Black or Tray, Dummy, D62099, Black.
1 x Dial, Automatic, Dummy No.3, Black (on CB variant).

To be requisitioned separately as required:-
1 x Block, Terminal No. 20/ . . , Black.
1 x Cord, Instrument No. 5/28E, 5".
1 x Dial, Automatic S.S., No. 10 . . .
1 x Key No. 303A or 304A.
1 x Label No. 160.
1 x Label No. 252 ..., Black

Diagram for telephone circuit - N408.

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. 308 to make it work on Plug and Socket

Dismantling the Telephone No. 308

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

 
 
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Last revised: April 22, 2022

FM