Pretty antique prescription eyeglasses with build in bifocals. They are rimless, have gold center attachment, not perfectly ground they have slight geometric shape. The ear guard plastic is cracked as pictured and nose guards yellowed. I'm unable to read the inside but I took a picture maybe you will understand what it means. I bought these because they're from my dad's home town and thought having a little piece of Whiting history is cool. I'm not sure that they're from the 1930s that is only a guess. Dr. M. D. Picklin Optometrist- phone 1106! Whiting, IN.