I recently had a 1974 Carlsbad Masi Gran Criterium (#247) side by side with a 1971 Italian Masi Gran Criterium. Both frames were down to bare metal. It was an interesting comparison. I would definitely give the edge to the Carlsbad frame. Wish I would have taken some pictures. Both finished bikes can be seen on Wooljersey if you search "Pyzyk".
Jeff Pyzyk
Milwaukee, WI