From Classic Driver: "The whole Scuderia Ferrari, Vuvolari/ Severi Alfa Romeo P2 Nr. 36, Enzo Ferrari/ Siena Alfa Romeo 6C 1750 GS Nr. 39, Alfredo Caniato Alfa Romeo 6C 1750 GS Nr. 38 and (not visible in this picture) Sozzi/ Augusto Caniato Alfa Romeo 6C 1500 No 40, this famous photo was pictured on the menu card "Primo anno di corse", estate Caniato, 17 x 12 cm historically valuable document"<a rel="nofollow" class="external autonumber" href="https://www.classicdriver.com/en/collectible/ferrari-original-bw-press-photo-race-6trieste-opicina-1561930">[2]</a>
Unknown photographer
<a rel="nofollow" class="external text" href="https://www.formulapassion.it/wp-content/uploads/2012/05/Nuvolari-Alfa-Romeo-Scuderia-Ferrari-Trieste-Opicina-1930.jpg">Nuvolari</a>