Nikon 20x - CP photo eyepiece relay lens
Description: Overstock from my lab. All metal in original box. They have bayonet-like mounting, but they do not fit Sony bayonet camera, so they must fit another brand. Not sure which (Nikon F bayonet mount, maybe). The small part says "detect", and the big one must be the photo eyepiece itself. Most probably to be used at Nikon microscopes. If you really know more details, send me private messaging so that I can describe it properly.
Issues: some nicks here and there from normal usage. Short one is optically like new; it has some nicks in the outter metal rim from usage (see pics). The big lens has some nicks in body and three very small nicks on the microscope side front lens (see pictures). I don't think they should affect greatly contrast.