"Until you actually drive a modern racing car it is hard to comprehend how violent the environment inside the car is, and this is my opinion is a fantastic way to really test the watches 'real time.'" 

Stefan Johansson sports his Mark VIII Carbon Fiber while flying down straights at speeds in excess of 180mph, and tearing through corners with 4G force. The severe vibration from the car, coupled with extreme gravitational pull of navigating sharp corners and high speed poses the ultimate challenge to a mechanical movement. The watch passes the test with flying colors, keeping perfect time after many laps in the harshest of conditions.