The story about the Super Zyns is that in the 1950's, each one had a faint image of Mussollinni's face impressed into it, right out of the mill. . It made the hand hammering, for all those Italian P.O.W.'s so, much easier. but time moves on and memories fade so, eventually , machines were brought in and I still think , rotocast blanks, sent over from the old country. Rotocasting, doesn't remove the necessity for hand hammering, it's just less obvious. If you look really closely at the later SuperZyns and 5 Stars you can still see the hand hammer marks along with sometimes predictable rows of trip hammer marks---like the Zyns. The lathing became more precise and refined later on and the hammering was covered up by that.