Unit Operator No 1 Mk 2 morse key Circa 1940-59 Green, wireless remote bakelite morse key, built into junction box, Unit Operator No. 1 Mk 2 YA 8414. Connection plug for a pair of black Stromberg Carlson headphones to one side and a plug for the black hand held plastic microphone. For use with vehicle mounted radios or a portable backpack radio.
