These were recently discussed. I happen to come across an ad for these in a 1974 brochure for the "Northbrook Amateur Bicycle Races 1974".
The add says that 14 models were offered for Road and Track. Models specifically mentioned:
MT-T1 (titanium frame) and MT-1, "Personal signature model designed and assembled by dr. ing. Alfieri Maserati now available with custom frame & components as ordered. Limited production."
MT-2 through MT-10, "10 speed models with Campi equipment."
MT-11, "10 speed with Simplex derailleur."
MT-12, "Ladies, 10 speed Mixte."
MT-14, "Boys, 24" wheel 10 speed."
The ad was taken out by: Costello Import Co., Green Bay, Wisconsin.
Another ad by Cyclery North of Chicago, IL mentions Maserati availability.
Angel Garcia
Long Valley, NJ