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.
1976
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.
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.