50-500 depending on specifics
You will need to start by contacting Mauser
100-300 USD
10-100 USD or so
what age serial # 917400
Will depend entirely on condition. Could be $50, or $250. Most will be in between.
You will have to contact Mauser
You will have to call Browning with the serial number.
The lower the serial number the younger the pistol is
No published sn data. 10-100 USD
The PY in the middle of your serial number dates your pistol to 1982.
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.
You will have to call Colt with the serial number to find out.