HOW DID I MISS THIS??? I must have been asleep at the switch. NEVER MIND!!
ROY!!! Stop That!!! You keep stumbling onto such SWELL TOYS!!
Don't know if you know the history .... But .... When still in business, Armi San Marco built reproductions of the Colt, Second Generation SA that were actually better than the Colt. EXCELLENT guns. Then for various reasons, some alluded to by Major 2, ASM quality went into the Outhouse. Still dimensionally more Colt than Colt, but crap for lock works parts. But ....
If one got a good one, those guns are a joy. It looks like your Bisley may well fall into the Excellent category. Because of the reputation for garbage parts, most ALL ASMs are valued in the basement, good or bad. Now for some interesting tidbits.
With just a little fitting .... Second Generation Colt parts will fit an ASM. Vice Versa too. Also, the other "better" Second Generation Colt is a Pietta GW II. Colt parts will fit a GW II, minor fitting, and vice versa. However, if you publicly admit you have used Pietta parts to return a Colt to serviceability, the "Coltistas" will form a Mob with a Rope. Blasphemy don't ya know.
Generally, I'd suggest swapping out for a Pietta SA Trigger/Bolt spring and the After-Market Main Springs from VTI Gunparts or Lee's Gunsmithing. That Bisley is a really super find. But ...... STOP THAT!!
May the Fourth be With You
Coffinmaker