This has not been opened and is completely sealed! Box is crushed, corners are not even dented.I can only assume the mask is mint! The item "1953 Korean War Gas Mask M2-10A1-6 Lt Wt Optical. Still Sealed In Box" is in sale since Friday, April 24, 2020. This item is in the category "Collectibles\Militaria\Korea (1950-53)\Original Period Items". The seller is "outdoorstuff14" and is located in Granite Falls, Washington. This item can be shipped to United States.