per proofhouse.com,around 1959
@1968
22 cal. single action colt frontier serial# 34170K was made in 1968
No serial number given.
Based on serial # 313213, It was manufactured in 1910. (312000-315999)
No way to answer without the serial number.
Made in 1958.
1959
1961
@1968
1959
A Colt frontier scout with serial number 127580F was made about 1960.
about 1907