Need identification help! Pls.

could be from a kit.

I believe that's an ASM, Armi San Marco.

That marking represents and contains the initials for ASM, at least it's supposed to.

Second arcticap's opinion.

Yeup, it's Armi San Marco. That's their mark, just in front of the trigger guard.

Which parts?

The hand will probably need to be fitted, a long slow tedious process of removing a tiny bit at a time and reassembling the gun and testing until the cylinder locks a teeny tiny bit before your trigger catches the hammer at full cock (almost simultaneously) you want it to time just right. Rarely does the hand just drop in and work. Even hands of the same brand made as a spare part for a specific gun will likely need fitting. I am not too sure about the current replicas (Pietta Uberti) made with CNC machines maybe not or a lot less but on a pre CNC machine days specimen like your ASM it's probably almost guaranteed to need fitting.

The trigger/cylinder locking latch spring is much less trouble. If the fork is too long it can be fitted (filed,) too short you have a problem but I think they usually do fit. Holding the trigger in position with the edge of the spring on it while you torque (without stripping of course) it down real good can often work wonders with springs that may at first seem to be just a hair too short.

All I know is that a long time ago Deer Creek products bought out the remaining CVA parts for the ASM's that were made for CVA.--->>> http://www.deercreekproducts.net/contact-us.html

And that VTI gun parts bought out the remaining ASM parts, and Lisa or someone else there could tell you which other company parts might fit better.--->>> http://www.vtigunparts.com/store/shopcustcontact.asp

Even though this was a long time ago, they're still worth a try. Deer Creek Products is often hard to reach by phone.

There are some gunsmiths here that work on guns who may be able to tell you more about which parts fit better.

Yes, this is definitely an old Armi San Marco mark

I agree that is an ASM stamp, but I see no date code, proof marks, nor serial number, and the OP states that is the only "marking" on the gun (except for the generic BP Only admonition on the barrel).

It appears to me to be a .44 kit gun, so that begs the question: did ASM market kit guns with no importer stampings?

Jim

The "kit" guns had no proof marks.

I concur:
It is an Armi San Marco gun made from a kit.
It has no proofs because it was never proof fired!
If it was early factory ASM, the proofs and the date code would be on the right side of the frame and if it was a younger version those marks would be next to the ASM pyramid logo on the frame and barrel in front of the trigger guard.
EMF's ASM "1851 Brass Frame Army .44 kit" was listed as "KIT-PER104/44" in my 1978 and 1979 catalogs.
The December 1979 price list has it for $60 retail and $38.90 wholesale.

Yup, as others have said, its an ASM kit gun..

Uberti parts would be closer then Pietta... But still need hand fitting.

Deer Creek is the best place, but seems they have been having issues lately.. maybe they'll be back, maybe they wont.. I have always had good luck with them and would always choose them first if possible.

If not, a simple "Armi San Marco" search of Ebay will always turn up parts.. Sometimes a few, sometimes a boatload...

ASM internals on Ebay:
https://www.ebay.com/itm/Hand-Sprin...h=item468e2bbe87:g:gpsAAOSw9~RcNNu7:rk:2:pf:0
https://www.ebay.com/itm/BOLT-SPRIN...h=item4433976e69:g:jnYAAOSw5tNcNNwg:rk:4:pf:0