Alfieri at the wheel of his Isotta Fraschini "Special" ca. 1922. It was a 6.3-litre Hispano-Suiza engine on an Isotta frame etc.<a rel="nofollow" class="external autonumber" href="http://www.diatto.com/EN/pagine/maserati.html">[1]</a> It may be that his brother Ernesto Maserati is in the passenger seat (they did a lot of racing together in 1922).
Unknown photographer
<a rel="nofollow" class="external autonumber" href="https://live.staticflickr.com/8054/28542620273_1480bb6dd7_b.jpg">[2]</a>