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The Colt Frontier Scout with that serial number was made in 1965.
Could not find a Colt frontier scout with serial number 56599P, but a Colt frontier scout with serial number 56599F was made in 1959.
Your colt frontier scout was made in 1968.
Your colt was made in 1966.
Your colt frontier scout 62 was made in 1966.
Colt frontier scout with that serial number was made in 1962 per proofhouse.com
A Colt frontier scout with serial number 127580F was made about 1960.
Your Colt frontier scout with that serial number would be 47 years old, made in 1964.
1959
Your frontier scout was made in 1963.
Your colt frontier scout .22 mag was made in 1962.
Your colt was made in 1959.