1950's US Air Force Pilot A-13A MS22001 Oxygen Mask

US Air Force pilot’s standard-issue oxygen mask, type A-13A/MS-22001. Size: MEDIUM. Dated 1956. Manufactured by Mine Safety Appliances. In new condition—perfectly supple and free of any cracks. Comes in its exceptionally rare original box, complete with accessories. The A-13A/MS-22001 oxygen mask was issued to US Air Force flight crews from the early 1940s through the early 1960s. Perfect for displaying with a P-3 or P-4 flight helmet, as well as early-model HGU-2 helmets.