You will have to call Colt or provide the serial number.
475
Proofhouse.com has Colt sn data.
1968
1961
1977
Your colt buntline scout was made by colt in 1964.
In 1959
@ 1967
Proofhouse.com has Colt sn tables.
Around 1959.
It was made in 1965.
Around 1958.