FWIW, there's quite a few "Browning" guns, that were born long after John Browning passed away, and some before, that were never designed by him.
It looks like it might be an FN SxS (FN makes high-grade Custom Shop Browning SxS' today).
Remove the forend & dismount the barrels for an inspection of the markings in the hidden metal parts, particularly the barrel bottom & flats, and the action watertable/flats.
If there's an "ELG" stamped therein, it was made in Belgium (FN is in Herstal, Belgium, BTW).
It may also to narrow down the date of manufacture with a pic/three of the other proofmarks, which came/went at various time periods.
Last edited by PetahW; January 29, 2013 at 10:27 AM.