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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
What else can I help you with?
What year was colt pistol made sn 38949?
Proofhouse.com has Colt sn data.
What caliber and year is the Colt Peacemaker SN 63015?
No way to tell caliber by sn. You will have to call Colt.
What year is this colt mk iv series 80 sn fa23028?
To new for sn's to be published. You have to call Colt.
What year is colt revolver 82516?
Proofhouse.com has Colt sn data.
What year is a colt huntsman ser027321s?
Proofhouse.com has Colt sn data.
What year colt combat commander 70sc9890?
No such sn. You will have to call Colt
What year was my Colt Det Spec?
You will have to call Colt with the sn to find out.
What year was a Colt Agent Ser?
You will have to call Colt with the sn to find out.
Find out the year of colt 45 acp?
Call Colt with the sn
What year is a colt 32 auto?
You will have to call Colt with the sn to find out
What year your colt cobra was made h99460?
Proofhouse.com has Colt sn tables.
What year was colt pistol sn 10046 made?
You will have to call Colt to find out.
