As the “archetype of the diver’s watch,” the Submariner has undergone many advancements in features and functionality, such as an increase in water-resistance depth to 300 metres (1,000 feet). In 2008, the watch also debuted its new graduated rotatable bezel with a scratch-resistant Cerachrom insert. The Submariner is available in two main model types: the Submariner and the Submariner Date, which includes the 3 o’clock date display with the Cyclops magnifier lens.