Value is too difficult to be accurate without seeing the gun. Condition which includes the amount of original finish and original configuration will determine value. Auto 5's with recoil pads (other than Mag 12's) poly-chokes and compensators will reduce value. Earlier Japanese made A5s without invector chokes are less desireable Recommend taking it to a gun shop for appraisal.
Magnum
Your Browning auto-5 magnum shotgun was made in Herstal,Belgium by the firm FN(Fabrique Nationale)for Browning in the year 1965 with the serial number that you have provided.
The letters PY that are in the middle of your serial number,indicate that your Browning Auto-5 Magnum shotgun was made in the year 1982.
I am sure happy to help but need more information starting with model or caliber.The 3V prefix was assigned to the browning auto-5 magnum shotgun.Your shotgun was made by FN of belguim for browning in 1963.
Your browning model auto-5 magnum 12ga shotgun was made by FN for browning in 1965.
Your browning auto-5 magnum shotgun was made by FN of belguim for browning in 1965.
You Have a Browning auto-5 shotgun that is a Magnum chambering which was made in the year 1968.
The prefix of 75x indicates that your Browning shotgun was made in the year 1975.
Your serial number indicates that you have a Browning auto-5 Magnum shotgun that was made in the year 1965.
Your serial number indicates that you have a Browning auto-5 magnum shotgun that was produced in the year 1965.
Auto-5 'Magnum Twelve' from 1965.
1962 auto 5 magnum