I looked in the Used Bike Buyers Guide and my notes say that Fiorelli made some of the Maserati frames. I also noted when I looked up Fiorelli that Fiorelli made some of the earliest Coppi decaled frames before Coppi production transferred to Masciaghi. I've seen both high end and not-so-high end Fiorelli frames, but I'm not experienced enough with Fiorelli or Masciaghi or Maserati to make a judgement about quality. I do know that many racers raced on Fiorelli made frames and they were popular in the 80s among Americans in Germany while I was stationed there. Lou Deeter, Orlando FL