This Bausch & Lomb Tessar Ic 190mm E.F. f4.5 is a nice vintage lens mounted in a Wollensak Betax shutter, supplied on a Deardorff lens board. Excellent cosmetic condition, with light paint wear; glass is clean, with minor dust. Shutter speeds are good, though it's worth noting that the max shutter speed is 1/50s. There is no retaining ring supplied with this lens, but a custom threaded mount is supplied, and it can be either remounted on a board for your camera or used as an ersatz retaining ring on a plain drilled board (not included)