If I understand German and geography correctly, Großer Bergpreis der Schweiz, is a hillclimb that connects the towns of Tiefencastel and Lenzerheide. What I find most interesting is that this event was run two years after the Le Mans catastrophe and I thought that racing had been completely banned in Switzerland by that time as a result.
John Von Neumann was Ferrari's distributor for California and he and his wife shared race cars. The pair raced all over the US, Europe, Mexico and even Hawaii. In 1957, John von Neumann ordered himself a Ferrari 625 TRC with a 2.5 Le Mans four-cylinder. A few races later, he bought the first 250TR V12 from Ferrari and the 625/250 TRC won about half of the races it entered.
Although all of the Von Neumann's American races in Ferraris were credited to either a 500 TR or 625 TRC, it is possible that he was driving someone else's car in Switzerland.
According to www.barchetta.cc this is not a 500 TRC but actually the 625 TRC (0672MDTR) with which he won so many races. The engine was sold in 1960 and it ran the rest of that decade with a Chevrolet V8. The engine and chassis were reunited in 2012 or 2013.
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