I wonder if it could be British. I would agree that it could be a basic grade shotgun except for one thing, which is the gold engraving on the barrel. Usually the higher grade guns had the lettering picked out in gold. The gun looks to be in fine shape==agree with the previous poster who suggested popping the barrels off and posting some pictures of the proof marks as that can tell a lot. The British had the BP while the Belgian ones have an ELC in a circle. And while Belgium did produce a lot of lower quality guns, they also turned out very good stuff. IF the bores were good in that I would purchase it just to use in a trap competition for fun.
Ed