Antique Spring Bridge Eyeglasses by American OpticalAntique pince nez eyeglasses. Small lens are rimless with a goldtone spring bridge and cork covered nose pieces. There is a small hole in the right lens where a chain can be inserted. Bridge is marked with the American Optical emblem. Lenses measure 1 7 8 x 1 1 8 inches. Width is 3 5 8 inches. They come in their original hard case which is unmarked. Alley Cats Vintage is a Member of the Vintage Fashion Guild.