I picked up a trap at a flea market that was just labeled “odd trap” it was 25 bucks but I liked it. I have no idea what this is and I’m hoping someone here does. It looks like a European design but I don’t know enough to make that assumption. It’s about the size of a 1 1/2 long spring, the pan has no visible markings, the dog is stamped 172. That’s the only markings I see on this trap. Thank you in advance for looking!

Yes, European gin trap.

That’s what I was thinking, thank you for confirming.