A curious frame is for sale on Craigslist and eBay.
A local bike buddy has apparently met the builder, and shared the following story:
Pettenella is an amazing guy. I spent some time at his shop in Milano and he was kind enough to send me home with an old cycling cap bearing his name. Famously, he once help a track stand for 65 minutes in a match spring under oppressive Milano summer sun. His opponent, exhausted and dehydrated, fainted and collapsed on his bike, sliding down the banks of the famed Velodromo Vigorelli. Vanni waited for the officials/medical staff to check out the unconscious rider (while still holding his track stand)...then took a lap to validate his victory and take the 1968 Italian National Championship.
A great story. The fact that Pettenella's competitor was willing to trackstand to the point of fainting rather than cede control of the early part of the sprint speaks volumes - about what, however, I am not sure.