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.
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.