This optical wonder is very special. Brass and rare blister pearl creation from the late 1800's. The only markings are engraved initials M.G.D. and Oct. 19th 1896. The telescoptic handle has beautiful detail work. These glasses are in excellent condition with a bit of dust under the lenses. The price takes this into account. At 4" wide by 1 3/4" deep when closed the handle expands from 6" to 9 1/2". A beautiful addition to an optical device collection. I believe these are French as came from a quality collection.