Well the stamping dies I've seen while programming the wire feed EDM for them were simply straight through shearing dies but they would radius the parts some just from the force of the impact of the shearing. I can just imagine that a part so small and thick would look like the four dropouts in the one photo but every time I look at the Gran Sport photo I still have to wonder.

Like I said though, I'm certainly no real diemaker and haven't, by a long shot, seen everything related to stamping dies. Never worked at all in any shop that made forging dies either although I've always been fascinated by the process.