Maserati V4 in 1930, driven by Ernesto Maserati says the picture source. It may also be his brother Alfieri Maserati who did race the V4 wearing white racing suits. It may be 1929, 1930 or 1931, but in 1932 it was rebuilt into the V5 and a slightly altered look. This car has no race number, so this may not be a real race, but perhaps before of after. Hard to guess, but it døs look like a V4.
Unknown photographer
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