FWIW: From what I can see, I think so too. I manipulated your picture and combined it with one I found on the net:
The one from the net is one of Morrill's patents and is in fact made by Morrill. There are tons of saw sets in different styles/configurations. Not saying yours is a Morrill or one based on one of their patents. I'm just an amature hobbyest with an interest in such things. But what stands out to me is the "L" shaped "anvil" with the perpendicular adjusting screw. The "wing nut" on the front of yours I don't think is typical, at least on saw sets that I've seen. Anyway, neat find.
Bob