USAAF Polaroid Variable Density Goggles

This set are in mint unissued condition and come complete with the original tin marked American Optical Company Contract N.X.S.S. 27918. The front of the goggles are embossed AO (for American Optical) and Polaroid. The variable density red lenses operate using the central knob. This pattern of flight goggles was designed for use by Air Gunners to aid spotting tracer in different light conditions. Rubber is in perfect condition as is the elastic back strap. It would be hard to find a crisper example.