50-1000 usd
50-800 uSD
value depends on overall condition............................
1919
Are you sure that the serial number is correct? Does it have a letter above or preceding the 36XX? If you truly do have a 1903 gun, it will say BROWNING AUTOMATIC ARMS COMPANY. Is this how your barrel is stamped? If not, then there is more to the serial number and it is either an FN gun, or it is not a 1903 gun. If you do have a 1903 gun, the condition is what will determine value. Most are pretty beat up that I see. Original condition with 60% or more finish can bring up to 1000, but appraising is impossible without inspection.
1903
The first Browning Automatic Shotgun patent was filed for on May 6, 1899, but not granted until June 16 1903. This was the first patent filed, but the last of four patents to be granted that had to do with the final configuration of what we know as the A5. auto5man
the FN browning model 1903 was produced from 1903-1927,with a total production of 58,400 pistols made.I am afraid that is the best I can do at this time with the info I have available.
The gun was manufactured in 1903. These serial numbers can be looked up at http://www.savage99.com/winchester1892_dates.htm. Value is dependent on the grade of the rifle. This information can be found by taking it to a dealer/appraiser.
1903-1939 sn range was 1-228000. Browning does not have good records for this time frame.
Minimal
Your browning auto-5 shotgun was made by FN of belguim for browning in 1938.In the condition that you describe your shotgun should be worth between 450-550 dollars.
Just about no way to value a weapon with just the serial number.