BUZZER No. 23A
This buzzer is used as an exchange howler, which was used when subscribers left their telephones off hook.

Fitted with two coils, each with a resistance of 500 ohms.

Dimensions - 89mm x 86mm x 38mm.

Siemens Brothers Part Buzzer No. 10A.

 
 
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Last revised: September 02, 2025

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