Trail running, mountain biking, ocean sailing or alpine climbing: robust timepieces with useful features are indispensable companions on land, at sea and in the air. Mechanical sport watches have proven their reliability under the most inclement conditions. Alongside their specific functions, they can also cope with rough treatment: they’re tough, watertight, shock resistant and frequently also protected against magnetic fields. Especially useful for people who love outdoor activities, many quartz watches offer even more capabilities. Thanks to innovative technologies, these rugged timekeepers may also include a compass, an altimeter or a thermometer. But both genres share a common denominator: painstakingly conceived details assure longevity and enable these timepieces to cope with extreme environments and tough demands.