BELL No. 56
bell (trembler) with a 2.5 inch gong (Gong-Bell No. 2).
Introduced in the early 1920's.
Coloured black these bells were universally used throughout by the GPO, Post Office and BT, plus many private companies.
Early versions, the Marks 1, 2 & 3, have a wooden base (see picture below) and metal cover but most found today will be made out of plastic.
Superseded the Bell No. 13.
Circuit Diagram - N656.
Drawing - 62797 (Mark 3 & 4).
Drawing - 62979 (Mark 5).
Specification - S541.
Bell No. 56C with a wooden base
Bell No. 56C with a plastic base
Last revised: November 06, 2023