Wall type telephone with Deckert transmitter for use on CBS exchanges.  This telephone is fitted with two switch hook switches and two receivers

Also known as the Post Office telephone for Granular Transmitter 'B' (GTB).

It has a press button fitted in the top of the case.

There is no bell in the telephone so an external bell was be provided.

Similar to the Telephone No. 17 and Telephone No. 21.

Note the oval brass number plate.  Each bell and telephone carried its inventory number.  Around 1907 the Post Office realised that numbering each telephone was too much effort for too little usefulness and stopped the practice.

Circuit Diagram - N119.

Picture dated 1901



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Last revised: February 02, 2023