100-10000 or so
like new 850 poor 200
500 USD
Try this link: http://www.browning.com/customerservice/dategun/index.asp
made in 1976
Your question is just like asking a Ford dealer "How much is my Ford made in Detroit worth"? Need a lot more details to even begin to attmept to answer.
You will need to conatact Browning and order a letter from them
Check the auction sites. To many variables that you don't address, like overall condition, accessories, box, manual, number of rounds fired, etc..
Blue Book of Gun Values is a good place to start.
Try Mid West Gun Works.
Sounds like you have an "American Browning" made from 1940-1949. These guns were made by Remington under contract to Browning during the German Occupation of Belgium when Browning could not import their Belgium guns. They do not say Remington anywhere on the gun, but essentially were made like the Remington Model 11, with the addition of the magazine cutoff. Browning specified that the serial numbers start at 5000 for each guage preceded by a letter to denote guage. A= 16ga / B=12ga / C= 20ga. Thus serial number B5000 was the first 12ga made in 1940. The serial number is on the left side of the receiver.
800 or so
You can find information like age and the worth of a product on a J.stevens Arms and Tool Co browning pat from the info engraved on it.