I've been shooting open top cap and ball revolvers since 1970 and 73 SAA's almost as long. I just got my first conversion revolver, a Cimarron Uberti 51 Richards-Mason in .38. Beautiful pistol! Shoots well too.
I can see the conversion back plate is a separate piece but can't figure out how it is attached since there are no screws.
How did they do that?