I remember seeing Russ Hamm frequently at gun shows in central Indiana that I attended with my father when I was growing up. I also remember visiting Russ's home in Crawfordsville, IN at one time. He performed some restoration work on the forestock of a Kentucky rifle for my dad at one time, and the work was maybe O.K. for the time period (late 50's) but certainly not up to suitable standards now. Non-matching wood type and lots of black paint to hide. He did borrow the M.M. Maslin lock from dad's rifle purportedly to use as the pattern for his Maslin style lock. I believe he later sold his lock business to Dean Mitton from Veedersburg, IN who continued making and selling "Hamm" locks for a number of years.
I recall that later on, Russ Hamm wintered in Florida for a few years, and I think it was during this time that he offered re-soled frizzens that sparked really well, but were re-soled with some type of radio active material.
My first scratch built rifle utilized on of his Dickert locks, which sparked well, but wasn't very tight, nor did the closed frizzen seal the pan. Tom Dawson told me there were better locks available, and I moved on to other types as a result of his sound advice.
Art DeCamp