1958
Your frontier scout was made in 1963.
@1962
Colt frontier scout with that serial number was made in 1962 per proofhouse.com
1971
You must call Colt.
Produced around 1967.
Proofhouse.com has sn data.
on the inside of grip
@ 1958. You need to call Colt to verify.
The closest I can find to that serial number would be a Colt peacemaker model .22 made about 1975.
According to www.proofhouse.com, somewhere between 1966 and 1967.
it ain't worth a monkeys left ball