Wooden cased Bellset used with Telephone No. 4 on CBS No 1, Plan 1 systems (1 simple extension).

Bellset includes (1928):-
1 x Bell, No. 13A minus base, or 1 x Bell No. 56A.
1 x Coil, Induction, No. 1 or No. 12

Mark 235 has a Bell No. 56A fitted internally with the bell gong positioned outside of the casing.

Made obsolete in 1947.

Circuit diagram - N 506.

Picture dated 1929


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Last revised: October 15, 2020