Basically no way to value a firearm with only the serial number and no other information.
Impossible to value with just the sn.
50-50000 USD or more depedning on specifics
Browning's web site has a sn search function.
Impossible to value a weapon with only the serial number and no detailed description
No way to answer without the sn and a detailed description.
$500-$700
Browning's web site has a sn search function.
Browning.com has sn tables you can look it up on.
Value from just the sn is a wild guess of 10-1000 USD
Impossible to value with just the sn. Could be 100-10000 USD
A shotgun made by Browning. Browning.com has a sn function under customer service.
You have an American Browning 12ga. made in 1945.