WW2 US Navy/Marine M-668 Summer Flight Suit 38 Long Unissued Condition Rare. Unissued Condition, tail on zipper. Has a couple of light stains from storage. The item “WW2 US Navy/Marine M-668 Summer Flight Suit 38 Long Unissued Condition Rare” is in sale since Tuesday, March 20, 2018. This item is in the category “Collectibles\Militaria\WW II (1939-45)\Original Period Items\United States\Uniforms”. The seller is “aviationetc” and is located in Toms River, New Jersey. This item can be shipped worldwide.