Lorus Sport RH953SX 9 Data Brand Tw Steel offering versatility in style offering versatility in style 4mm Case Size Stainless Steel Case Polyurethane Strap Accuracy: ±15 seconds per month Sapphire Crystal 200 Meters Wate Resistant Rotating bezel with sailing indicators Luminous hands and markers Alarm functions Moonphase and lunar age display Perpetual calendar (to 31 December 2199) Yacht racing and race timer functions World time (43 cities 29 time zones) Chronograph and countdown timer Tide graph with 203 location settings Sunrise and sunset display Power reserve Quartz Movement 42mm Case Size Stainless Steel Case and Bracelet 100 Meters Water Resistant