Looking to identify this trap

Someone dropped off a bucket of traps at my house. Most are junk but this trap was in there and I have never seen anything like it. It seems to be a 1 1/2 size.

Anyone know what it is

Sta-Kawt, made by Animal Trap Co and sold by Sears. 1930’s. Came in a #1 and 1 1/2 size.

The #1 size trap came in both a dogless and dog on model. The dog on model is more difficult to find.