The latest addition to the IWC Aquatimer lineup is the Deep Three, the successor to the GST Deep One from 1999 and the Aquatimer Deep Two from 2009. The watch features an automatic mechanical IWC caliber 30120 movement and depth indicator in blue, as well as, luminescent hands, dial, and internal bezel. A red maximum depth indicator remains at the maximum depth attained, down to a maximum of 50 meters, and provides a complete backup system to a dive computer. The 46mm x 16.5mm case is made of titanium, with a screw in crown and back engraving. IWC's quick-change bracelet system rounds out the details.