My father in law has been working on a house for a few years, and the elderly owner gave this to him, which he in turn gave to me. It's a "Young America" Double action. The damn thing is tiny, and I believe is a .32. Pretty corroded on the other side. Based on my initial research, I believe it is close to 100 years old. Story is that the homeowners farther used to carry it while he went gambling. Who knows.