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1970
1959
about 1875
After 1978.
1958
it ain't worth a monkeys left ball
Based on proofhouse.com, it was made between 1958 & 1959,
1974 Source: mine :) my precious darling I'm a gun specialist
and the model is..................................
A Colt single action 1860 army with that serial number was made in 1866.
your colt single action was made in 1970.
Your colt single action army dates to 1881 with the serial number you provided.