Impossible to answer without a detailed description of all markings, features, barrel length, sights, grips, box, papers, accessories, condition, type of action, etc..
go to proofhouse .com and click colt serial numbers,this will tell you the age of your colt.
You can get a historical letter from S&W for 50 USD.
No published sn data. You will have to call Rossi
You will have to get it lettered by S&W to find out.
The butt.
50-200
1877 if it's a Single Action Army. Nothing special about the serial number.
1967
Check the butt
@1949/50
@ 35 years old
No published sn data that I am aware of.