It's such a shame that Armi San Marco went Darwin.
ASM Built SA reproductions were the closest thing to a Colt on the planet. Then their QC went in the Toilette and shortly after, they went the same.
Today, in the reproduction world, the closest reproduction to a Colt is the Pietta Great Western II. In my sordid past, I used Pietta parts to repair and return ASM guns to service.
Most of all, I miss the ASM built 1st Model Richards reproduction. Basically built on an 1861 but who cared!!! The guns were really nice.
Except it took 7 or 8 of em to get two that worked reliably (sigh).
PS: Willi was asking another while I was typing the above ... so ...
It's a Crap Shoot. I don't personally know anyone who kept track of the variations in the markings between the makers of a specific model. I know when I was still in business, I didn't have the time to study the marks. Finding what fit what was interesting as well. Some hammers, some barrels, ejector assemblies, cylinders, triggers will interchange, albeit with some fitting perhaps required. Almost NONE of the Grip/Griopframe screws interchange. I once built a set of guns for a friend from two boxes of odd parts he had. Turned out to be ASM BP Frames, Uberti Barrels, ASM Ejectors, Pietta cylinders, Pietta hammers, Pietta triggers and lock parts, ASM Trigger guards with Pietta back straps. I custom made the stocks.. The answer to what have you got?? My best guess is an ASM Frame. After that ..... anybodies guess.