A-9 US Army Air Force regulation pilot and aircrew flying oxygen mask. Size SHORT. Dated January 1942. Made by ACUSHNET Stamped US ARMY AIR FORCE. Nose clip is missing. Hooks and rings system for A-9 and B-6 flying helmets. Rare juliet head harness included. Rubber is pliable without any cracks. Excellent condition. Scarce model. Crusher hat, display bust and sunglasses aren't included.