The Montblanc 1858 Geosphere 0 Oxygen The 8000 is powered by an automatic movement inside of a 42mm titanium case. The black ceramic bi-directional rotating bezel features the cardinal directions. The dark gray dial has a glacier design and is protected by sapphire crystal. Complications include world time and a date window. The titanium bracelet is secured by a steel deployant clasp. Water resistant to 100 meters.