Korean War MS 22001 oxygen Mask Dated 1954/55/56 US NAVY Size Medium. More in store at Flyboy Plus Aviation etc.Army, Navy, Air Force, Marines. Military WW2 Patches, Aviation Equipment. Hats, Helmets, Rare Items, Parachutes, Fight Suites, Equipment, Survival Gear, New, and used Originals, and Reproductions WW2. The item "Korean War MS 22001 oxygen Mask Dated 1954/55/56 US NAVY Size Medium" is in sale since Friday, September 23, 2016. This item is in the category "Collectibles\Militaria\WW II (1939-45)\Original Period Items\United States\Hats & Helmets". The seller is "aviationetc" and is located in Toms River, New Jersey. This item can be shipped worldwide.