Enzo Ferrari (right), Nicola Romeo (middle) and engineer Giorgio Rimini (left). The writing says "Monza, 1923". Perhaps at 1923 Italian Grand Prix on 9 September 1923.<a class="external autonumber" href="https://en.wikipedia.org/wiki/1923_Italian_Grand_Prix">[1]</a> A 2013 newspaper article also says this is Rimini on the left: <a rel="nofollow" class="external text" href="http://www.giovannagiordano.it/articles/64%20Adalberto%20Libera%20architetto,%20mostra%20a%20cura%20di%20Nicola%20Di%20Battista,%20p.21,%202%20ottobre%202013.pdf">L’ingegnere catanese che fece grande l’Alfa Romeo</a>
Unknown photographer
<a rel="nofollow" class="external autonumber" href="https://preview.redd.it/8fa49mew9yb01.jpg?width=960&amp;crop=smart&amp;auto=webp&amp;s=87c5c2fe8b2c629d8d9e721c48ea58eea6e375da">[2]</a>