Oxygen Master Regulator Mark X, British RAF, 106D/24 Lily Bomber It has "B-50" stamped on

It has "B-50" stamped on the rear case

and Wurzburgs

made by Avien

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

Oxygen Master Regulator Mark X, British RAF, 106D/24 Lily Bomber It has "B-50" stamped onThis 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