Let me add a little bit of extra information.
This particular car was built for the Scuderia Serenissima of Conte Volpi di Misurata.
It was noted for it's headrest and stabilising tailfin.
I know it was raced at the Pescara 4 hours event in 1961 with Nino Vaccarella & Joakim Bonnier.
Other races I don't know without further research.
Maserati Tipo 63s were also raced by Briggs Cunningham's team in their white and blue livery.