As with any firearm, it is not possible to accurately appraise a gun without seeing it. Condition, and original configuration will determine value. Other factors such as rarity of caliber or guage and higher grades have significant impact on value. Recommend that you see a local gun dealer for an appraisal. You can also do your own investigation by looking at other models being sold that are in the same condition as yours. Try the gunbroker.com or a periodical called "The Gun List" You can also reference the Blue Book of Gun Values which can be purchased on line at various retailers.
500-1000
$350-$650
500 USD
1950
1950.
Fabrique Nationale in Herstal Belgium made all of the Browning Belgian guns, even after 1950.
1,32 CAN $
With the serial number that you have provided,your Browning auto-5 standard weight shotgun was made in Belgium in the year 1950.the value will be between 325-400 dollars for a shotgun in the condition that you have described.
The winners of the Belgian League in 1950 were RSC Anderlechtois.
50-500 USD or so
50-460 USD or so
50-500 USD or so