You will have to call Browning.
If you have a Browning auto-5 shotgun in 12 gauge it was made in the year 1925.If it is a 16 gauge shotgun,then it was made in the year 1929.
If your Browning auto-5 shotgun is chambered in 12 gauge then it was made in the year 1928.If it is chambered in 16 gauge,then it was made in the year 1938.
If you have a Browning auto-5 shotgun in 12 gauge then it was made in 1927.If you have one in 16 gauge then it was made in the year 1931.
With the serial number that you have provided,your Browning auto-5 shotgun in 16 gauge was made in Belgium for Browning in the year 1926.
If your question is about a Browning auto-5 shotgun in 12 gauge,then it was made in the year 1925.If it is a 16 gauge shotgun,then it was made in the year 1929.
That all depends on the gauge of your auto-5 Browning shotgun.If you have a 12 gauge,then it was made in the year 1921.If you have a 16 gauge,then it was made in the year 1927.
Your serial number indicates that your Browning auto-5 shotgun in 16 gauge was made in the year 1937.
Your serial number indicates that your Browning auto-5 16 gauge shotgun was made in the year 1947.
1951 was the year this gun was made
If your Browning auto-5 shotgun is a 12 gauge,then it was made in the year 1929.
With the serial number that you provided,your Browning 16 gauge shotgun was produced in the year 1949,by FN of Belguim for Browning.