I have been collecting flight gear my entire life and this is the only A-15 oxygen mask I have ever seen. Thank you for your interest in my auctions. WW 2 US Army Air Forces Pilot Original A-15-A Oxygen Mask, 1945" is in sale since Saturday, July 6, 2019.This item is in the category "Collectibles\Militaria\WW II (1939-45)\Original Period Items\United States\Field Gear, Equipment". The seller is "dauntlessaviation" and is located in Apache Junction, Arizona. This item can be shipped worldwide.