Bakelite cased handset wall telephone for use in CBS No 1, 2, 3 & Magneto areas and on long lines in CB & Auto areas on extension plans.

Fitted with a DC Trembler bell and has provision for three buttons.


Circuit diagram - N493.

Diagram for the Button labels  - N620.

History, Technical and General Information on 300 type telephones

Development of the Bakelite Wall Telephone

Collectors information

Keys for use in 300 type Wall and Table Telephones

How to restore Bakelite

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Last revised: November 20, 2021