IWC Schaffhausen / endurance testA watch strap has to endure the pull of 200 newton force for one minute.The rotating dive ring used for setting dive time is turned 16,000 times in both directions under water.Watch cases with sensors are exposed to a 37-degree warm salt-chlorine solution for two weeks.At the crown push-button testing stand, pneumatic pins press on the crown 20,000 times.Wallpaper Magazine / AUTO FOCUSWallpaper Magazine / AUTO FOCUSWallpaper Magazine / AUTO FOCUS