LOVE THESE!!!  I know nothing about early eyeglasses....I just buy cool old things.  I am told these are from the 1860s and I believe it from other things I have seen.  All original, the frame is brass and the glass is a gorgeous deep teal green....These are double fold and I see no damage to the glass or frame.  Very cool rectangle shape as well.  Comes in a case that I found them in....could be original to the glasses, no idea....but they stay together.....please feel free to ask any questions.