Ahhhhh.
The Mod.07 is NOT the early Prototipo.
It is very similar except around the ends of the bottom spoke where it meets the rim, and also it has a yellow band at the 12:00 position. There could be other diffs too, but I'd have to see them side by side in person to tell for sure.
The statement that it is used in factory race cars is correct! It was used in the 911 cup cars etc. after the early Prototipo was discontinued!