Yes, Browning has made the Superposed Lightning in Belgium.
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.
40891 s5
Browning offers letters now for @ $40 USD
100-2000 usd
Your Browning lightning superposed shotgun was made in the year 1968 with the serial number that you have provided.
Browning offers history letters for @$40 USD
Check 1966 gun catalogs
Browning.com has a sn fucntion under customer service.
With no other data provided, 100-10000 USD
100-1000 usd
You must provide the serial number for the question to be answered.