TELEPHONE No. 306


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

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

Detail as for Telephone No. 326, Black, minus Cord, except  the Cradle-switch action is 2M, lC, instead of 2M.

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 with a switch hook bracket and plungers of an improved design.

 

Diagram for telephone circuit - N406.

Diagram for Button labels - N620.

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

 

 
 
BACK Home page BT/GPO Telephones Search the Site Glossary of Telecom Terminology Quick Find All Telephone Systems

Last revised: September 21, 2019

FM