I am glad you can confirm the maker of the barrels on the Meffert drilling. I honestly would not have known what the square inside the circle figure meant even if I had seen it and paid attention to it. I also have a later post war Merkel 201 Luxus grade gun with Boehler steel barrels that I did not include in my list. We see so many unmarked barrels and/or guns from the pre-war German period, it's often very difficult to know exactly who made what. I would never have thought that a maker as large and well known as Griefelt would use Sauer barrels on one of their fine guns, but I have one clearly marked with the SUS intertwined mark in multiple places on the barrels.
