The Germans certainly made plenty of guns for export: Charles Daly, and a lot of Sauers going to VL&D and their successor, A&F. Mine being an A&F import, it's hardly surprising to find "2 3/4" stamped on the gun. Chokes are also stamped. But there were far more important things that often separated German guns made for export than various stamps. For example, far less likely to find a cheek piece and sling swivels on a Charles Daly, or a Sauer made for VL&D, VL&A, or A&F, than on a gun made for sale in Europe. Also much more likely those guns would carry scroll engraving rather than the typical Germanic deep relief game scene.