Try e-gunparts.com.
try colt factory: 1 800 962 2658
Could not find a Colt frontier scout with serial number 56599P, but a Colt frontier scout with serial number 56599F was made in 1959.
Can't find a colt frontier scout sn 67654P,however a 67654F was made in 1959.
Colt frontier scout with that serial number was made in 1962 per proofhouse.com
You need to call Colt to find out.
You must call Colt with the serial number to find out.
Find an owner's manual.
Proofhouse.com has Colt sn data.
You will have to call Colt with the serial number to find out.
try Vintage grips.com
probably made in the mid 1960's
Blue Book of Gun Values.