Variable Density Gunner's Goggles USAAF Original

Black 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.  The goggles were also fitted with a red plastic 'flip-down' visor for observing tracer bullets under various conditions of sunlight and brightness.