Serial numbers are listed in several publications try, Proofhouse publishing's Colt Serial Numbers for starters. Note the Colt factory burnt down during the Civil War so the majority of records prior to 1864 have been lost so the serial numbers listed prior to this are just estimates based on production figures.
proofhouse.com
The lower the serial number the younger the pistol is
The PY in the middle of your serial number dates your pistol to 1982.
YOu will have to request a letter from Colt for the history. Value could be 50-5000 USD
You will have to call Colt with the serial number to find out.
Impossible to answer without the serial number.
No way to answer without the serial number.
The year of the Colt 25 pistol with the serial number 255465 varies greatly depending on the actual model of the pistol. That serial number in the model 1908 might date back to the early 1900s. That number in later models can be from the 1950s.
In order to tell how old your Colt 25 semi auto pistol is, you will need to offer the serial number. This number gives you an idea of when the pistol was manufactured.
No serial number = no answer.
Way to many variables and a scant description. Go to Jan C. Still's Luger Forum and look around.
Exactly how is the pistol marked? 9mm browning serial number 72C44338
Impossible to answer