TELEPHONE No. 306


Introduced in 1939 this is a combined table handset telephone used by the BPO in CB and Auto areas.

This telephone has a DC Trembler bell, with one gong and provision in the Bakelite case for three press buttons.

Used on extension plans that require an additional gravity switch hook springset.

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

Circuit diagram N406.

Click here for the circuit diagram - Web users - CD users

Click here for Button labels  - Web users - CD users

History, Technical and General Information on 300 type telephones

Collectors information

Keys for use in 300 type Wall and Table Telephones

Lamp Fittings

How to restore Bakelite

Labels that fit in the sliding tray

How to wire your Telephone No. 306 to make it work on Plug and Socket

Comparison chart of GPO 300 type telephones

 

 
 
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Last revised: April 09, 2012

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