Your question is basically not answerable. Since it began making firearms over 150 years ago, Colt has made hundreds of thousands of products. Colt also made items which have no relation to firearms and had serial numbers. If you provide a detailed description of all markings, caliber/gauge, barrel length, handgun or longgun, etc.. an answer might be possible
Proofhouse.com has Colt sn data.
No way to tell caliber by sn. You will have to call Colt.
To new for sn's to be published. You have to call Colt.
Call Colt with the sn
Proofhouse.com has Colt sn data.
Proofhouse.com has Colt sn data.
You will have to call Colt with the sn to find out.
You will have to call Colt with the sn to find out.
You will have to call Colt with the sn to find out
No such sn. You will have to call Colt
You will have to call Colt to find out.
Proofhouse.com has Colt sn tables.