Stores Ref. 10A/11994. Black painted alloy microphone, often referred to as the '1941' pattern although actually introduced in October 1940. Has paint chipping/rubbing on exposed edges. Air Ministry and King's crown markings. Retains the original rubber 'band' around the microphone on the reverse although this is hardened. Remains of the original loom still attached. These microphones were used in conjunction with the type D cloth oxygen masks. Quite good used condition. Stock code O4598.