1976
Impossible to answer without a serial number.
If the serial numbers starts with a "G", you have a Colt Peacemaker Buntline. The serial number you list has to two more numbers than it should have. If the sn is G62260 - it was made in 1973 If the sn is G26028 - it was made in 1971 A New Frontier Buntline would have NF in the serial number.
about 1971
Your colt was produced in 1971.
Made in 1975.
1959 for the Colt frontier scout .22 Q model with that serial number.
The records I have, show a Colt frontier scout .22 Q model with that serial number was made in 1959.
A Colt frontier scout .22lr with that serial number was made in 1959.
you will have to call Colt. the sn you list does not follow the standard numbering procedure.
Based on proofhouse.com, a frontier scout/peacemaker .22 with that serial number is about 47 years old having been made about 1962.
1968
Need serial number to answer.