Pre Ray-Ban USA Vintage Aviator WWII Bausch & Lomb Army Navy AN6531 Sunglasses

This listing is for authentic Pre Ray-Ban Bauch & Lomb AN-6531 Brass Core Nickel Plated Frame (to prevent interference with navigation equipment) Cable Temple RB-3 Sage Green Mineral Glass Lens WWII Era Military Aviator Issued Pilot Sunglasses w/ Case 57-12-115 ULTRA RARE 1940’s Army Air Corps / Navy Airmen. Sunglasses are in fair/good vintage pre-owned condition, both lenses have some scratches (see photos). Size: 57-12-115. Made in USA. Original B&L Military issued aluminum hard case included in listing. Please see pictures to make your complete condition assessment. Originating in the late-1920s, the "teardrop" shape lens of the AN6531 were designed to accommodate Air Force pilots who were constantly looking down at their instrument panel while in flight, and of course all future aviators are recognized by this lens shape. The inner nose bridge is impressed “Bausch & Lomb”, an early nickel-plated version of the iconic and original AN6531 aviator from which all future Ray-Ban aviator and Outdoorsman sunglasses evolved and continue to this day. The lenses were made to a joint standard shared by the U.S. Army Air Corps and the U.S. Navy. As a result, the lens carried an “AN” (Army/Navy) specification number: the AN6531. The U.S. Government specified the shape of the lens and the color, which was initially a 50% green tint. This tint proved insufficient to protect pilot’s eyes from sun glare so this lens was superseded by the AN6531 Type 2 lens in rose smoke.