My 1969 Super Corsa Road Bike has the sloping crown and still has the drain hole in the bottom bracket. In addtion is has chromed tipped forks. I purchased it in 1969 from Spence Wolf. I hope this helps a little bit.
San Jose, CA
> Does anyone know if the square crown fork was used on Super Corsas or
> Speciale Corsas? If so, when was the sloping crown introduced? I know
> that the square crown was used on track models and the Model B. Also,
> does anyone have info on when and on what model chrome tipped forks and
> chainstay "socks" were used? Finally, Did Cinelli definitely eliminate
> the bottom bracket drain hole in 1965 or could it have been a bit earlier?
> Jeff Pyzyk
> Milwaukee, WI