I vaguely remember seeing something like it several years ago but don't remember any details. At first glance I thought maybe an old Goshen but after I looked it up I don't think so. It's going north of $500 so far so I'm pretty curious.
Thanks for the additional photos - looks similar to a Triumph chain rig. I didn't find anything on it in Gerstell's book but Andreski & Parr's guide has it listed as a #4 sized trap made by JH Hutchinson, 1914. Not much info beyond that.