Please help me identify this piece of equipment. It looks military spec, but don't know anything about it.
I want to look up some history about what it was used for.
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The construction does not look appropriate for military service. Coast guard, Civil Aviation, emergency services or industry looks more likely. Photographs of the interior may yield more clues. A fixed squelch control may be a clue this was designed for VHF or UHF. It was not common to totally enclose radio equipment without ventilation so this may only contain the remote control circuit.