Graham Chronofighter Oversize Superlight TT Written byWatchTimeMay 30, 2013 As official timekeeper of the Isle of Man TT Motorcycle Race, Graham is marking this year’s race with the release of the Graham Chronofighter Oversize Superlight TT chronograph, a lightweight watch weighing less than 100g. To achieve this light weight, Graham developed a case made of carbon nanotube speckled composite. The watch is designed with motorsports in mind, sporting not only a lightweight case, but lap time functions as well. The Superlight TT chronograph facilitates the measurement of speed with a special tachymeter scale based on the length of the TT circuit, which is 37.73 miles. In honor of the race, the case back features the Isle of Man emblem. The watch is powered by a Caliber G1747 automatic movement with a power reserve of 48 hours, and will be a limited edition of 200 pieces.