Greetings, Ed Tinker,
I have two Simson Nagants in 44 caliber. I bought them quite a few years ago. At that time I did a little research on the company and the revolvers with the help of a very kind gentleman at Waffentechnik in Suhl, Germany.
The information I have is a little sketchy and not documented as it was told to me via email, but if you feel it may be of use to you, I can try to dig it out of my great pile of paper files. It was of interest to me, but I was not writing a book,either.
I can take photos of details if needed. Glad to be of any help.
