Ocean Diver Series. Swiss Made. Analog Black Dial with Silver Tone Hands and Index Hour Markers (including Arabic at 12). Minute Markers Around Outer Rim. Luminescent Indices/Hands. Date Display at 6 O'clock. Unidirectional Rotating Bezel made of Zalium Alloy (a proprietary zirconium alloy). Sapphire Crystal. Automatic Movement with Chronograph Complications: Two Sub-Dials (30-Minute and 12-Hour), Minute, Second, Hour. Calibre GP31C6S/M/H2 Specified Movement Type. Water Resistant to 200 Meters / 660 Feet. Round Case Size Approx. 44 mm. Solid Case Back. Tang Clasp Strap Closure.