Seiko SRP275K1 Men's 5 Sports Automatic Watch Imported 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