Thank you very much for your response.
I will keep the S/N table as a reference for future research.
Based on the information that you remind me, Bernard consten had an incredibly successful year in 1958, winning the Tour de France with the sedan Giulietta, and also Coupe des Alpes and "Liège-Rome-Liège" with a SZ..
I will follow your advice to try and find out more about this Giulietta 1300, although it seems difficult to find out S/N for racing cars in this period.
Again, thank you for your help.