Kodak Vintage Photographic plates. Your bid is for TWO boxes, one sealed, one opened. The sealed box containing 12 glass plates weighs 580g. The opened box weighs 510g, presumably at least one plate has been removed. I have NOT opened the box myself to check the contents. These are date expired vintage items offered as a collectors item, or for display/curiosity only. I have no idea how they have been stored, or the viability for actual use. They may be usable, but maybe not. There is just no way of knowing. I do not have a dark room and have not tried. Caveat emptor.