Depends on the make, model, and condition. There were a LOT of different rifles made in Belgium. IF the rifle is a Browning BAR (civilian model), it may be worth anywhere from $200-600.
Mossberg made all their rifles in the USA.
It will be marked.
Armscollectors.com has a sn database.
no they are not made anymore
You sure this isn't an EJN 757 instead of a JEN 757? I have a EJN 757 in 3006 and would also be interested in any info. for this rifle.
Assuming a Grade I Condition is important: NIB EXC V.G. Good Fair Poor 650 450 375 300 250 125 Belgian manufactured rifles are worth about 15% above these prices. Grade II and III are higher. $250 and up
Proofhouse.com has a store brand chart
1976
No published sn data.
The model number is 117
Only Browning knows.
$75-$150