I have one that I bought new in 1976. Somewhere at home I have the books for it. I'm on the road right now and will not be home for a week. I'll send you info as soon as I can. Mine is a single action .22RF, with two cylinders. One for .22 S,L, and LR. The other one is for .22 Mag. I really like the safety that blocks the hammer from hitting the firing pin, works great. Rog