550-0035 was an Italian delivered spyder on the 12 April 1955 ready for the Mille Miglia race 2 weeks later. It was a white 550 with blue darts and engine # P90029. The spyder was piloted by Araldo Sassone who finished 4th in class in the Mille Miglia.
Piero Facetti raced it at Monza the following month finishing 11th. 550-0035 raced in Italy throughout 1955 and 1956, but it is unsure who the owner of the spyder was during these races as the drivers changed for each event.