Frontier Scouts with a Q suffix had an alloy frame and were produced from 1957-58. Some came with an extra cylinder. Frontier Scouts with the K suffix where produced from 1960-1970. They were a Zamac alloy frame version of the "Q" Model. IIRC, they did not have the option of an extra cylinder. COLT SCOUTS, PEACEMAKERS, AND NEW FRONTIERS IN .22 CALIBER by Don Wilkerson is a good book to have if you own one.
Your colt frontier scout K model was made in 1961.
Your Colt K model frontier scout .22 pistol was made in 1964.
50-300 usd
1959 for the Colt frontier scout .22 Q model with that serial number.
From the records I have, the Colt frontier scout .22 Q model was produced in 1967. (210500F-223199F) about 1967
You must call Colt with the serial number to find out.
100-400 USD
That serial number is for a Colt Frontier Scout K Model chamberd in 22LR.
550.00 in good contion
Your frontier scout was made in 1963.
Your colt frontier scout 22lr was produced in 1960.
Frontier Scout - 1938 was released on: USA: 16 September 1938