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POST OFFICE RELAY 'B' No 5462, 1920's

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POST OFFICE RELAY 'B' No 5462, 1920's

Odd version marked as 'B' but more like a 'D' relay, for information on Telegraphy relays see item A0252. it has a single throw contact is non polarised (no magnet) has only one coil, with no other markings.
Resistance 500 ohms.

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A0277



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