Some notes. Some of this history on Balestrero is from Leif Snellman:
June 1933. Bought by Balestrero. 1934 Mille Miglia 6th place: Sanguinetti/Balestrero, team "Gruppo (Genovese) San Giorgio" [1] Possibly Cesaro Sanguinetti of Genova.
1934 sold to Uboldi Martini. 1935 MM 6th with Balestrero/Sanguinetto
1934 sold back to Balestrero, immediately sold to Giovanni de Rham, then Jacques "Giacomo" de Rham who got 7th at 1936 MM with Sergio Banti
1936 sold to Elda Ermini
1938, 25 December: Winner of 1st Circuito di Asmara in Eritrea, with owner Emilio Romano (see pictures below). License "13480.." (maybe "13480 BS", BS meaning Brescia[2])
1938/9: Romano sold to local salesman in Asmara. 1939 license "ER 16620".[3]
sold in Asmara to Lt. Marsden. Shipped to India.[4]
1946, early. Rebuilt for RS 2000.
1947, 2 March. Sold to Jimmy Braid in Ahmedabad for RS 6000. Seller was Lt. Robin Marsden. Shipped by rail to Calcutta. Registered "BYA 3573"
sold to Maharaja Myrasingh of Ranchi
sold to american engineer Howard Jackson in Calcutta, racing in Calcutta, shipped to US by him in 1963
(various owners in USA)
1979 sold to Gary Schonwald, New York
1986 restored. Schonwald thinks it was a Brianza (i.e. Zagato)