Well, specific case in point, which company (on a larger bore than stock) stamps (in vertical letters in the form of a square): "made in" (on one side of the square) and "Germany" (making up the right side of the square)? The stamp is so small that, at first glance, it simply appears to be a square stamp.
Upon closer inspection, it is realized that it is worded. And, no, I do not have a view of the piston domes as the block is still assembled.