Maserati 450 prototype at GP Sweden in 1956. The driver looks like Piero Taruffi, he is listed as one of the 3 factory drivers on this car, the others being Harry Schell and Stirling Moss.<a rel="nofollow" class="external autonumber" href="https://www.racingsportscars.com/results/Kristianstad-1956-08-12.html">[1]</a> Entry #T did some practice runs, but did not participate in the Sunday race on 12 August 1956.  Some historians think this was the s/n 3501 chassis, restamped s/n 4501 before leaving for Sweden. Others think not. <a rel="nofollow" class="external autonumber" href="https://www.racingsportscars.com/results/Kristianstad-1956-08-12.html">[2]</a>
Rickard Bruzelius
<a rel="nofollow" class="external autonumber" href="https://www.italianways.com/wp-content/uploads/2014/05/IW-Maserati-450S-Fantuzzi-1956-22.jpg">[3]</a>