The serial number is on the receiver.
Your serial number indicates that your Browning auto-5 16 gauge shotgun was made in the year 1948.
with the serial number that you have supplied,your Browning auto-5 shotgun in 16 gauge was made in the year 1934.
With the serial number that you provided,your Browning 16 gauge auto-5 shotgun was produced in the year 1935.
You must call Browning with the serial number.
Your serial number indicates that your Browning standard weight 16 gauge auto-5 shotgun was made in Belgium in the year 1947.
Your Browning auto-5,12 gauge shotgun was made in the year 1948,with the serial number 265,711.
With the serial number that you provided,your Browning model auto-5 shotgun in 16 gauge was produced in 1956.
Your Browning auto-5 shotgun in 16 gauge was made in the year 1930,with the serial number that you have provided.
Your Browning auto-5 16 gauge shotgun was made in the year 1931.
A Browning auto-5 shotgun in 12 gauge with the serial number provided,indicates that it was made by FN of Belguim for Browning in 1905.
It was made in 1950
With the serial number that you provided,your Browning auto-5 shotgun was made by FN of Belguim for Browning in 1926 if you have a 12 gauge model.If you have a 16 Gauge model then it was produced in 1929.