Very nice and difficult to find US WW2 Variable Density Air Gunner Gogglesi n original tin, made by the American Optical/Polariod company. Grey rubber facemask with a rigid plastic front frame housing circular lenses. Each lens was actually comprised of two separate lenses, one of which could be rotated over the other using a centrally mounted knob. The effect of this rotation was to achieve differing degrees of density from clear through a range of pinks/reds and enabled the wearer to track targets in the vicinity of and acrorss the face of the sun. This model does not incorporate the red plastic 'flip-down' visor which later models had (so this is NOT missing!). Used primarily by airgunners. The order no. dates them to 1944. This pair is in excellent condition. The goggles are 'Polariod' marked. Complete with the storage tin of issue showing minor storage wear (AO marked). Unique 100% original item for your US WW2 collection, difficult to find personal item! See also our other interesting items on catawiki!