You will need to add the name of the model of gun along with the serial number to get a accurate answer.
Proofhouse.com has Colt sn data.
You will have to call Colt to find out.
Proofhouse.com has Colt sn tables.
Your colt was made in 1961.
Proofhouse.com has Colt sn data.
your colt was made in 1963.
Proofhouse.com has Colt sn data. If not there, call Colt.
1920
about 1904
About 1952.
@ 1959
Made in 1934.