You can find out at Proofhouse.com in the Colt tables.
The lower the serial number the younger the pistol is
Depends on the model and serial number.
What model?
NO
1978
you would need the model number as well as serial number.
Go to: www. proofhouse.com with serial number.
what is the SERIAL NUMBER ??????????
PC0327
Will need model name to answer.
1918
Impossible to do with just the sn.