Claim: The European motorcycle Grand Prix was held at the Swiss Grand Prix three times before 1948, twice won by manufacturer Moto Guzzi.
Evidence: The Swiss Grand Prix (French: Grand Prix de Suisse, German: Großer Preis der Schweiz, Italian: Gran Premio di Svizzera) was the premier auto race of Switzerland. The European motorcycle Grand Prix was a motorcycling event that was reintroduced as part of the Grand Prix motorcycle racing World Championship from 1991 to 1995. Between 1924 and 1948, the European Grand Prix was not a race in its own right but just an honorific title; one of the national Grands Prix was also designated as the European Grand Prix. Until 1937, the winners of the race designated the European Grand Prix were awarded the title of European champion. Switzerland Swiss Grand Prix Switzerland Swiss Grand Prix Sweden Swedish Grand Prix Switzerland Swiss Grand Prix Italy Italy