US NAVY M 450 POPLIN KHAKI CADET HELMET, VERY NICE STRONG CONDITION! The item "US NAVY M 450 FLIGHT PILOT AVIATOR HELMET SZ 7 1/4" is in sale since Saturday, February 8, 2020. This item is in the category "Collectibles\Militaria\WW II (1939-45)\Original Period Items\United States\Hats & Helmets". The seller is "willy_1946_jeep" and is located in Chetek, Wisconsin. This item can be shipped worldwide.