I went out for a quick 2 hour hunt and found RHEIN GOLD - that's what it says.......but it's a false package anyhow I found my first 3rd Reich coin in a decent condition usually they are all rotten and soon become a member of my "dead coin club"
Looks like a lead bag seal? Rhein Gold made a very expensive sewing machine as well as thread bobbins and the like. Not sure about any other products but the fabled Rhein Gold was the gold of the king guarded by the Rhein maidens SO it was treasure. Could apply to flour sacks or just about any product wanting to declare itself fine like the treasure of the Rhein maidens