None of the Monzas I have seen were from the 70s. All were late 50s, early 60s. Was vintage bikes a thing in the 70s to make counterfeits? Also, I don't know anyone who has seen more than 5 examples of these things. How could anyone possibly tell the difference between "real" and "fake"?

It seems to me, the only question not known about these bikes is whether the decal was factory applied or not. So would it really matter if a bike shop in Monza did it in 1960 or a French shop did it in 1970? My money is on a bunch of knuckleheads in Monza who all bought Cinellis over the course of 3-5 years, decided to do a group buy to be best bike buds forever. Prove me wrong.