The records I have show 1979 starting with serial number SA01001, so the best I could figure, yours would be possibly a year or two after that.
your colt single action was made in 1970.
If it is Colt single action army, then it was made in 1889.
your colt single action scout was made in 1964.
If this is a Colt single action army, it was made in 1874.
your colt single action army was made in 1902.
A Colt single action 1860 army with that serial number was made in 1866.
My records indicate that your 45 colt single action army was made in 1883.
Your colt single action army was made in 1906.
Made in 1973.
Colt single action army with that serial number was made in 1910
Colt data at Proofhouse.com