If you were at a car show and asked "I have a Ford with four wheels and would like to know what it is worth". You can imagine all the followup questions and information that would be needed to get an accurate answer. Colt has been making both firearms and non firearms products that had/have serial numbers for over 150 years. Without a detailed descripiton of exactly what you have, trying to find that particular serial number would require hours of research and hoping the sn has/had been published.
You will have to call Colt with the serial number to find out.
You will have to call Colt with the serial number.
You will have to call Colt with the serial number to find out.
You will have to call Colt since you did not provid the serial number.
Proofhouse.com has Colt serial number tables.Proofhouse.com has Colt serial number tables.
You will have to call Colt or provide the serial number.
You will have to call Colt with the serial number to find out.
You must call Colt with the serial number to find out.
With that serial number, you will have to call Colt.
No way to tell with just the serial number. You will have to call Colt.
No such serial number for a Colt 25 ACP
No way to answer without the serial number. You can call Colt and they will tell you if you provide the serial number.