My records indicate that the serial number X91801 belong to a Browning auto 5 shotgun in 16 gauge that was produced by FN of Belguim for Browning in the year 1953.A Browning auto-5 shotgun in 16 gauge will bring between 250-550 dollars for a shotgun with between 60%-90% original condition,and a good bore.
Your browning was made in 1930.
Basically impossible to value with just the sn.
-525 USD
There is no way to give a value from just a serial number.
Impossible to value with just a maker and serial number.
50-500 usd
Tough to do without a model number.
50-500 usd
50-500 usd
10-1000 USD depending on specifics
10-1000 USD depending on specifics
Need a detailed description