your browning auto-5 was made in 1925.
your browning auto-5 was made in belguim by FN in 1914.
Your Browning auto-5,12 gauge shotgun was made in the year 1948,with the serial number 265,711.
1933
1969.
1952
Your browning auto-5 wa made by FN of belguim for browning in 1931.
1930
By the serial number.
@1940-46
Your serial number indicates that your Browning auto-5 shotgun was made in the year 1928.
Your browning auto-5 shotgun in 16ga. was produced by browning in 1953.