You will have to call Browning with the serial number or request a letter. Current cost is @ 40 USD.
Your Browning superposed,over under 20 gauge shotgun was made in the year 1951;with the serial number that you have provided.
Browning has made centerfire lever action rifles in various calibers over the decades.
A Browning over and under is worth about $1,000-1,500 on it own and the fact that it's a Belgium made Browing increases the price significanly. I would say somewhere in the range of $500 to $750 more. The belgium made Browning is the most collectible and popular.
Shotgun made by Browning.
40891 s5
Browning offers letters now for @ $40 USD
If your over under shotgun was made prior to 1964,then the model of your Browning shotgun should be named the superposed.
Yes, Browning has made them.
You will have to call Browning.
Browning offers history letters for @$40 USD
Browning.com has a sn function under customer service.
Browning.com has sn data under customer service.