Integrated with innovations like the Quick Change System, IWC Schaffhausen has gone to great lengths when developing and refining its range of professional diving tools. Aquatimer watches are a blend of robust materials and innovative functions for measuring elapsed time underwater. A water resistant housing is guaranteed in every IWC Aquatimer watch, along with features that include internally rotating bezels, screw down crowns and supple rubber straps. Some IWC Aquatimer watches feature specially engraved casebacks, chronograph functions and legible day date apertures. With a reliable sealing system and a bracelet facility that enables the strap of the watch to fit over heavy diving gear, every IWC Aquatimer watch is ready for offshore or onshore action.