Just got a new toy/ training aid to mess with, it is a 1968 Harrington and Richards 939, a .22LR 9 shot revolver. This is one I got off Gunbroker, wasn't a terribly expensive or valuable thing. I was mildly disappointed when I got done with the transfer, to find the hammer seemed kind of jammed and would not pull back smoothly. On disassembly, I found that there is a plastic part on the top of the mainspring, which had broken. Pretty common issue from what I'm reading, and the replacement ( already ordered) from Numrich has a metal head, so shouldn't fail the same way again. Anyway, it cleaned up fairly well, and feels like it's going to have a very nice DA trigger pull, which is what I was hoping for. Probably going to have to fabricate my own left handed wood grips for it, as the only replacements I'm seeing are plastic. Rifling looks ok-ish, we'll see how it shoots after the new mainspring assembly gets here.