I recently came across a SXS by Jan Visser of Deventer (Holland) with Belgian proofs and a reversed j on the barrel flats. The gun is a boxlock with ejectors, 27.5" barrels, English stock , 12G @ 6.46 lbs.I Googled the name and town but only came up with a list of two guns auctioned by Holts. I am interested in more information about this gunmaker and his guns. Any help would be appreciated. Thanks, Wayne S