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
Made in 1975.
Impossible to answer without a serial number.
1976
Your colt was produced in 1971.
The records I have for Colt single action army, buntline & new frontier AAA (post war) ended in 1978 with # 99999SA. 1979 started with SA01001, so take it from there.
Based on proofhouse.com a Colt frontier scout .22 revolver 62 K model with that serial number was made near the end of1963 as 1964 started with 14730P
was the http://wiki.answers.com/Q/Colt_single_action_buntline_22_lr_serial_number_82593f a service revolver
1959 for the Colt frontier scout .22 Q model with that serial number.
you will have to call Colt. the sn you list does not follow the standard numbering procedure.
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.