no, they are made by the Colt Arms Manufacturing Company in Conn.
A Colt single action 1860 army with that serial number was made in 1866.
Your colt single action army dates to 1881 with the serial number you provided.
If it is Colt single action army, then it was made in 1889.
eBay
If this is a Colt single action army, it was made in 1874.
Look on the frame
My records indicate that your 45 colt single action army was made in 1883.
The Colt Single Action Army revolver with the serial number SA31171 was manufactured in 1974. The Colt Single Action Army, also known as the Colt .45, has been produced in various years since its introduction in 1873, but this specific serial number indicates a production date in the mid-1970s.
The Colt Single Action Army revolver was first introduced in 1873. It became known as the "Peacemaker" and quickly gained popularity among law enforcement, military personnel, and civilians in the American West. The design has remained iconic and is still produced today, making it one of the most recognizable firearms in history.
SAA stands for single action army.
1886
around 1978