Seiko Men 5 SPORTS 4R36A 100M Sport SRP277K1 Imported Seiko 24 Jewels Self-Winding Automatic Movement with Hackable Second Hand (Calibre 4R36) Stainless Steel Case, Nylon Nato Type Band Hardlex Mineral Crystal, Day/Date Display with Spanish Option, Luminous Hands and Markers, Easy Reader Dial Case Size: 39.5mm Diameter, 11.6mm Thickness Water Resistant - 100M, Transparent Screw Down Case Back