You must call Colt.
Your frontier scout was made in 1963.
1958
@1962
Colt frontier scout with that serial number was made in 1962 per proofhouse.com
Produced around 1967.
1971
Proofhouse.com has sn data.
on the inside of grip
@ 1958. You need to call Colt to verify.
To determine the manufacture date of your Frontier derringer with serial number 3222, you would typically need to consult the manufacturer's records or reference a specific production timeline associated with that model. Frontier Derringers were produced in various batches, and the serial numbers can often indicate the year of manufacture. If you cannot find this information online, reaching out to the manufacturer or a firearms historian may provide the most accurate date.
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.