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.
1970
about 1907
1883
1886
If it is Colt single action army, then it was made in 1889.
If this is a Colt single action army, it was made in 1874.
about 1892
thanks from rob
It was made in 1970.
about 1878