Buck? 6" 6-1/4" Adjust-Tru 3-Jaw Lathe Chuck Flat Back Mounting 1-5/8" Center. Please take a look at all pictures to determine the condition for yourself. There is no make or model on this chuck, which tells me that it likely an older Buck that the sticker fell off of. Doesn't look like a Bison or a Pratt Burnerd to me. Does not include the key.

As far as the chuck goes, it operates smoothly and doesn't appear to have anything wrong with it. The jaw faces look good, tiny little marks but nothing worth talking about in my opinion.