Wilton C 1 most likely. No cracks or welds its a great deal at $150. Fyi I put ad on craigs asking for vise for a year and got a lot of broken or overpriced ones to look at and can't say I found one half as good as the one you posted. I paid $250 for one in about same condition last year. Probably Wilton best homeowner light commercial vise they make. Most all made in US especially if made before 1970.