Vise Rescue!
I found an old Yost in an antique shop, and felt duty bound to save it from "display piece" status or the scrapyard. It's a Yost no. 1. Markings are a capital Y on the dynamic jaw and YOST MFG CO MEADVILLE PA NO 1
For those of you, like me, who don't know your Yost model numbers, it's a 3 1/2" covered screw swivel base with the center bolt that goes clear through the workbench. It's all there, locking disc, wingnut and washer, jaws, handle. But it's in terrible condition. Rust, old paint, saw and file marks on the jaws, and worst of all, a large chunk about 6" long is broken out of the slide and missing. (pix to follow - can't post them from here)
With that amount of damage, I doubt it's worth fixing. It would take a large amount of work to make a replacement piece and weld it in. Unless it's extremely valuable because it's a No. 1, I think it's best used as an organ donor. If any of you are interested in parts let me know.
I haven't torn it down yet, and won't get to it for a few days. In the meantime, I'm curious about its age. Hard to do without pictures, but maybe someone can hazard a guess.
Thanks!