BELL No's 67A and 67B

Large Magneto bell (AC) with twin 6inch gongs for external use.

The bell ringer comprised of two 500 ohm coils. The No. 67A was fitted with extra terminals and links which allowed the two bell ringer coils to be wired in parallel to make 250ohms, which would be used on Magneto lines or in series, making 1000ohms for CB and Automatic lines. The No. 67B had only terminals and the bell resistance was set at 1000ohms.

Bell No. 67A was superseded by the Bell No. 67B in 1964.

Fitted with Bell-gongs No. 15A.

The bell mechanism is assembled from piece parts.

Dimensions - 318mm high x 330mm across x 83mm deep.

Introduced circa 1933.

ATM part T2025.

Adjustment of Magneto bells

GPO Engineering Instructions on Fire Systems

Click here for the difference between a Bell and a Bellset

Drawing - 62796 (Bell No. 67A).
Drawing - 92153 (Bell No. 67B).