Hardware Detail

Item Reference:
Machine Type:
"Duo" Relay
Serial Number:
  "Duo" (or Post Office Type) Relay
  These relays were used to switch higher currents than wire contact relays, and were used in the same ranges of hardware. They are similar to the relays used in the same era by the UK Post Office for telephone switching. This example is missing its armature.
Date of Origin:

"Duo" Relay

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On Display - HLG46 Commissioned By: Museum Until: