Vintage Ray-Ban Bausch & Lomb clip-ons in hard-sided leather felt-lined case

B&L Bausch & Lomb Ray Ban aviator sunglasses, clip-on style. Gold-filled frame and green-gray lenses. These original, authentic sunglasses are a must-have for any Ray-Ban fan or collector of vintage accessories. Features the intricate perimeter etching typical of the era. Have not been able to precisely date but best guess is 50s, perhaps 40s. I believe the lenses to be RB-3 but that's a guess. Marked "B & L 1/10 12K GF" on the underside of the bridge. See photos for measurements. Some wear to the leather case, especially at the hinge, but it's in great shape given its age. Felt interior in great shape.