MZ
Two cars in the very first race
The entry list of the first race of May 1965 shows two cars under this name — written on the same page once as MZ and once as M.Z.
They were driven by Enrico Forti for the Scuderia Mirabella Mille Miglia and by Pierantonio Colombo for the Scuderia Madunina.
After that the trail goes cold: the name does not appear again in our later results.
What we do not know
What the two letters stand for, who built the cars and how many there were: we have nothing. If you know something, please get in touch.