The Urwerk UR-100 was inspired by a 19th century pendulum clock —a present to Felix Baumgartner from his father Geri, a now-retired renowned clock restorer— made by Gustave Sandoz for the 1893 World’s Fair in Chicago. The regulator-style dial does not show time. Instead it shows the distance of the Earth’s rotation at the equator. The extra-long pendulum beats every 2.16 seconds, making every oscillation one kilometer. The main dial has a scale of 10,000 kilometers, shown in units of 100 kilometers, so that each tick —half oscillation— indicates 500 meters traveled on the Earth’s surface—at the equator. The top subdial —10 km— is divided into 10 units, while the lower subdial showing a total of 40,000 km —approximately the equatorial circumference of the Earth— is divided into increments of 1,000 km.