BELL No. 53A
Magneto bell used indoor and outdoor.

Fitted with twin 6 inch gongs (Bell-Gongs No. 15), the Bell coil resistance is 1000ohms.

A modified version of this bell is used in the Telephone No. 25. The bell mechanism and gongs are mounted internally.

Normally associated with Telephone No. 129.

Superseded by Bell No. 67.

Adjustment of Magneto bells

GPO Engineering Instructions on Fire Systems



 
 
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Last revised: August 14, 2025

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