Professor K. , Jul 26, 2012; 10:07 p.m.
The 'UV Topcor' was made by Topcon to fit the Auto 100, a (relatively) inexepensive 35mm SLR camera from the late 1960's, and its successor models, e.g. Unirex. It will not fit any other camera, and it will not fit other Topcon cameras that use an Exacta mount with internal diaphragm action. It may have some collector value if it is in exceptionally good condition but I would not expect a high price. Suggest you check 'completed auctions' on the well-know auction site.