Spanish Grand Prix
The first Spanish Grand Prix in 1913 was not actually run to the Grand Prix formula of the day, but to touring car rules, taking place on a 300-kilometre road circuit at Guadarrama, near Madrid, on the road to Valladolid.
1947 Buenos Aires Grand Prix (I)
The first of two 1947 Buenos Aires Grand Prix (official name: I Gran Premio del General Juan Perón, also known as the I Gran Premio Ciudad de Buenos Aires) was a Grand Prix motor race held at the Retiro street circuit in Buenos Aires on February 8–9, 1947. The scheduled competitions opened on February 8 with two preliminary rounds of the Mecánica Argentina - Fuerza Limitada and Mecánica Argentina - Fuerza Libre classes for a combined final which determined the qualification for the February 9, Formula Libre main event.