Vintage Delicate Gold Silver Eyeglasses Frames Pair Antique ? Lightweight Metal

This is a pair of delicate, lightweight metal eyeglasses. One pair is silver colored and the other pair is gold colored. They are both the same style. They are in good condition with obvious signs of wear and age. There is also patina forming. They will look more clean once new lenses are put in - you will not be able to see out of them as-is. It looks as though there was engraving on the ends of the arms but most of it has worn away. However, the silver pair looks like it says "China 039".