SEIKO Superior World Timer 100M Automatic SRP039K1Caliber: 4R16 Automatic Movement, 22 Jewels Made in Japan , 50 HoursA window at the 3 o'clock hour reveals the automatic day calendar.Metal: Black TiCN plating Stainless Steel Size: 45mm with crown Band: Black TiCN plating Stainless Steel braceletWater resistance to 100 meters/ 10 barsGlass: Top Sapphire crystalDial: BlackOne year International warranty