Oxygen Master Regulator Mark X, British RAF, 106D/24 Lily Bomber An example of aircraft in

An example of aircraft in which this appeared is the Nieuport 28 fighter

Used in most US bombers during WW2

can send the Rebecca operator a coded message by depressing a key provided for that purpose

Very similar to the Askania FI22306 circa 1936

type AN-5825-7

Oxygen Master Regulator Mark X, British RAF, 106D/24 Lily Bomber An example of aircraft inThis WWII era Oxygen Master Regulator Mark X was used in large bomber aircraft of the British Royal Air Force and Royal Canadian Air Force, such as the Avro Lancaster. The Mk X regulator was for a high pressure continuous flow oxygen system and allowed the pilot to control the flow of oxygen centrally for up to 8 crewmen. The left hand knob controlled the flow of oxygen, which would be displayed on the ALT gauge. The flow was to be set to match the