R.A.F. Type 20 Microphone (Used in Type D Oxygen M
Stores Ref. 10A/11994. Black painted alloy microphone, often referred to as the \"1941\" pattern although actually introduced in October 1940. Most of the original paint remains. Air Ministry and Kings Crown markings. Rubber \"band\" that goes around the microphone on the reverse is perished. Remains of original loom still attached. Stock code O4590.