By the serial number and going to proofhouse.com
You can find out at Proofhouse.com
Proofhouse.com has Colt sn tables.
You will have to get a letter from Colt to find out.
What model?
Proofhouse.com has Colt sn data.
You will have to call Colt and provide them the sn to find out.
You will have to call Colt to find out.
You will have to call Colt with the sn to find out.
Call Colt
You will have to call Colt to find out.
Proofhouse.com has Colt sn data.
Need to know the model of the colt. Look in www.proofhouse.com