Entry #42 is an OSCA MT4 1500 s/n 1163, and it was owned by Luigi Musso who drove it at GP Roma on 21 October 1956 with entry #42, so maybe this is it. In that case, he WON the game.<a rel="nofollow" class="external autonumber" href="http://www.wsrp.cz/nonchamp1956.html">[1]</a> That is, he won his class (S1.5).
Unknown photographer
<a rel="nofollow" class="external autonumber" href="https://bilsportarvet.se/2014/06/osca-ett-stycke-italiensk-motorhistoria/">[2]</a>