Sir Malcolm Campbell exceeded 300mph (485kph) for the first time at Bonneville Salt Flats in Utah in 1935, 3 years later in 1938 Vacheron Constantin was the timekeeper when he successfully bid to break his own record on water on lake Hallwyl in Lucerne reaching 130.91mph (210.68kph)
Patented in 1935 and invented by Albert Pellaton for Vacheron Constantin this time recording apparatus for sporting events was capable of measuring time to the nearest tenth of a second. Within a cage of light metal (duralium) a high precision watch movement turned the four discs that printed the hours, minutes, seconds and thenths of a second directly on to a metallic strip. Driven by a second movement as accurate as the first, the recording film unspooled in front of the printing discs. When the operator pressed the push piece designed for the purpose (in hand held chronometry), a third mechanism applied the film directly to the printing discs and to the fixed markers that allowed the recorded time to be read easily. The film passed onto a turntable, before spooling onto a bobbin. When it was not transmitted to the computing office, a copy was spooled onto a second bobin.