MR. Roller's locks are like a finely tuned Swiss watch, I have one on a rifle made in the early 70s, the friend I got the rifle from said the gun had 50K shots or more during its lifetime. The rifle is a .44, my friend sad he burned a pound of powder a week shooting a 30 grain B/P load, that is a lot of shots over the years.
The gun had been shot so many times that the frizzen was worn almost all the way thorough. When MR. Roller started posting on the ALR site, I asked him if he still had any frizzens for this lock, he did. He said he would like to see the lock and take measurements to compare them with his new out of the box specs. He replaced the worn frizzen, checked my lock and found that the internal measurements hadn't changed over the years.
MR. Roller quit selling locs in the US a number of years ago, he said he got a lot of flack about the price of his hand-built lock from the US flintlock crowd. He said European buyers didn't bat an eye at his slightly more costly locks and gave him as much business as he could handle.
Here is my Roller lock, yours may look similar, mine is stamped "Roller 72" on the inside of the lock plate.
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