I'm relieved that Jeff Stephens checked in to comment. Personally, I would rather rely on a serious researcher than to contact "an old German living in Sweden" (Niklas' words) when I have a question about a Sauer. My little 10 is a 1905 (not 1907 as I mistakenly posted) gun in the 118,000 series. It is a tight choked light duck gun, 26" Krupp barrels, total weight of gun six pounds, four ounces, yes 6 1/4 pounds, with very acceptable wall thickness. It is all original with ten gauge proofs. By the way, I have a frind who also was in possession of a heavier, also modern Sauer boxlock ten, but have lost track of it. I am surprised that my friend Geno is not familiar with the research of JS. Geno, is DGJ available in Russia at a reasonable price?