Circuito di Mantova on 6 October 1946.  From left:  #80 (unknown), #78 (Tazio Nuvolari in Cisitalia D46), #84 (a "Fiat-Maserati-Marino", ended in 3rd place).<a rel="nofollow" class="external autonumber" href="http://www.lanciamarino.it/sito/images/phocagallery/autovetture-brandoli/thumbs/phoca_thumb_l_mas010.jpg">[1]</a> One source claims Guido Barbieri in Maserati A6 CS was the winner (not in this picture).<a rel="nofollow" class="external autonumber" href="https://www.racingsportscars.com/photo/Mantova-1946-10-06-7787.html?sort=Results">[2]</a>
Unknown photographer
<a rel="nofollow" class="external autonumber" href="https://farm4.staticflickr.com/3429/4564032689_b9f6da6a48_z.jpg">[3]</a>