You will need to call Browning.
your browning auto-5 was made in 1925.
Your browning auto-5 wa made by FN of belguim for browning in 1931.
your browning auto-5 was made in belguim by FN in 1914.
Your browning auto-5 shotgun was produced in 1931.
Your browning auto-5 12ga lightweight shotgun was made by FN for browning in 1967.
your browning 16ga auto-5 shotgun was made in 1949.
Your browning auto-5 shotgun in 16ga. was produced by browning in 1953.
A visit to Browning's website might answer your question.
Your serial number indicates that your Browning auto-5 shotgun was made in the year 1928.
50-500 USD. Browning will have to tell you the age.
Your browning auto-5 shotgun was produced in 1953.
1933