Not a valid Browning serial number.
You will have to call Browning with the sn to find out.
It was made in 1959
This was made in 1926
Your serial number indicates that your Browning auto-5 shotgun in 16 gauge was made in the year 1937.
With the serial number that you provided,your Browning 16 gauge auto-5 shotgun was produced in the year 1929.
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.
I have a belgium 12 gauge browning shot gun with the serial #B67119. I am trying to find out what type or size choke it has
Impossible to answer without the serial number.