Made in 1958.
1958
22 cal. single action colt frontier serial# 34170K was made in 1968
A Colt frontier scout with serial number 127580F was made about 1960.
No serial number given.
No way to answer without the serial number.
1959
@1968
You will have to call Colt with the serial number to find out.
Your Colt frontier .22 K model was made near the end of 1963 as the year 1964 started with serial number 19724
Proofhouse.com has Colt serial number tables.Proofhouse.com has Colt serial number tables.
1958
1960