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| Circuits | Country | Date |
| Bremgarten | Switzerland | 18th May 1952 |
| Indianapolis | USA | 30th May 1952 |
| Spa-Francorchamps | Belgium | 22nd June 1952 |
| Rouen-les-Essarts | France | 6th July 1952 |
| Silverstone | Britain | 19th July 1952 |
| Nurburgring | Germany | 3rd August 1952 |
| Zandvoort | Netherlands | 17th August 1952 |
| Monza | Italy | 7th September 1952 |