VINTAGE crystal earrings

Bought these in a vintage shop a few years ago. Don't know how old they are..but old! Very well made. Aurora borealis crystals. These have some of the best color of any I've ever seen. To me the colors come together and they just seem to glow. Clip on. The only marking is a patent #..I'm guessing for the clip itself. They also have hinges for each section of crystals...they move and swing so they catch more light. As far as I can tell they are in perfect condition. Better in person!