Very rare 1st pattern US Army Air Force regulation pilots and aircrews A-10 flying oxygen mask with 3 points fastening device. Size STANDARD. Dated April 1942. Made by ACUSHNET. Stamped US ARMY AIR FORCE. Excellent condition, pliable rubber, complete with original nose clamp and its juliet harness to allow  the mask to be worn without a helmet. Scarce model, especially in this kind of condition. Considered as very uncomfortable, it will be modified from summer 1943 on. Very hard to find in its original design as most have had their forhead strap cut following field regulations.

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