This video shows the CX Swiss Military Dive Chronograph going through extreme durability tests. High-pressure water from an airport fire truck could not break the case or crystal. Shotgun blasts at close range could not penetrate. And even explosives powerful enough to destroy a car could not pierce the case. But maybe the most significant test was the test the video does not even show. The water-resistance test. For this test, the watch passed with flying colors. In fact, this is the world’s first mechanical timepiece to withstand a depth of 20,000 feet.