De Joux bought the Ferrari 375 that José Froilán González drove and won the 1951 British Grand Prix at Silverstone from New Zealand racing driver Ron Roycroft. He converted it into a Gran Turismo that looked like a genuine factory built Ferrari road car. It was an exquisitely proportioned car used by de Joux daily for the next four and a half years until he sold it. The car was restored back to a single seater by a Christchurch classic car enthusiast and is now owned by Bernie Ecclestone.