Proofhouse.com has Colt sn info
The butt.
No serial number data published.
The Ruger Old Army revolver with serial number 140-23568 was manufactured in 1980. Ruger produced this black powder revolver from 1972 until 2008, and specific serial number ranges can help identify the production year. The serial number you provided falls within the range indicating it was made in the early 1980s.
1877 if it's a Single Action Army. Nothing special about the serial number.
there are far to many #s to be a proper serial #
On the underside of the frame
The Colt Single Action Army revolver with serial number 82026SA was manufactured in 1976. Colt's production records indicate that this serial number falls within the range associated with that year. If you have specific features or markings on the revolver, they can also help confirm its production date.
Proofhouse.com has Colt sn data.
What is the age of a Colt .45 Single Action Army with a serial number ofSA95946
0-1000 USD and up
check out: proofhouse.com/colt/index.html
You will have to get it lettered by Colt to find out.