Racecar driver Alfonso De Portago in 1956 Ferrari 750 Monza s/n 0568M at Karlskoga racetrack outside Stockholm, Sweden, on 25 August 1956, the main Kanonloppet race was next day.  At left is Carl-Gunnar Hammarlund, TV personality and racecar driver. Next to him is Tore Bjurström, who imported Ferraris to Sweden at the time. Then there is a Ferrari mechanic (BP hat, probably Italian). Behind De Portago (rightmost man) is John Kvarnström, also a racecar driver.
Åke Ahlstrand, Börje Gustavsson, Jan Holmlund or Rolf Carlsson
<a rel="nofollow" class="external text" href="https://www.facebook.com/photo/?fbid=3989684067923588">J Wiktorsson</a> (Facebook)