Wall mounted Bellset with magneto bell and capacitor, for use with C.B. table sets on ATM Co's automatic systems.

Used with Telephone No. 72, 72A and 98.

The was an American make and an English make. 

Bellset included (1928):-
American make
1 x Bell (on door of case or on body of case).
1 x Condenser, M.C., No. 4.

English make - Marks 234 and 235
1 x Bell No. 1A, unmounted, with bias spring.
1 x Condenser, M.C., No. 3.

Circuit diagram - N508.
Diagrams A.T. 12 and A.T. 202.

Adjustment of Magneto bells

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Last revised: February 03, 2020