Tommy Bahama Men's 10018306 Kona Grand Prix Chronograph Analog Display Japanese Quartz Brown Watch Japanese quartz chronograph movement with date, high grade genuine grain leather calfskin strap with a solid stainless steel buckle closure and keeper High grade, stainless-steel case, caseback and crown, durable k1 mineral glass crystal & water-resistant to 100m (330 feet), and all with a 5-year limited warranty Japanese-quartz movement Case diameter: 45mm Water resistant to 330 feet