United States Army Air Forces / USN / USMC. The marking are clear and readable - 1944 dated. Both C0 2 inflators are intact - (but no Co 2 cartridges).
It looks good for your display , I'm not sure it will still hold air today. I wouldn't recommend depending on it to save your life! These are getting hard to find today. Commonly used by the 8th Air Force B17 bomber crews in Europe. Don't pass it up - real WWII versions are scarce.
A must have for all WWII militaria collectors! Used on all WW2 USA - B17 , B29 , B24 , b25 , P 38 , p47 , p51 , C47 , F 4 aircraft. The item "WWII B 4 LIFE VEST ARMY AIR FORCES WW2 USA USAAC USAAF" is in sale since Friday, May 17, 2019. This item is in the category "Collectibles\Militaria\WW II (1939-45)\Original Period Items\United States\Field Gear, Equipment".
The seller is "phmical" and is located in Hoffman Estates, Illinois. This item can be shipped worldwide.