You must call Browning with the serial number.
You must call Browning to find out.
Browning's web site has a sn search function.
You will have to call Browning to find out.
1969
1979
YEAR 1973
It was made in 1927
Browning's web site has a sn search function.
A browning auto-5 shotgun with the serial number you provided,was made by FN of belguim for browning in 1914.
If your browning shotgun is a auto-5 in 16ga. then it was made in 1929.
To my knowledge,Browning has never used the letter B as a prefix to their serial numbers.You may want to recheck your serial number.