Case: 47 mm Polished Stainless Steel Exhibition Back with Sapphire Glass Caliber: Automatic Valjiox 7750, Incabloc, Glucydur Balance, Nivarox Alloy Hairspring Functions: Hours, Minutes, Subsidiary Seconds, Day and Date Chronograph: Hours, Minutes and Central Seconds Crown: 9 mm Knurled, Double O-Ring Sealed Crystal: Domed Sapphire Glass with Anti-Reflective Treatment on the Lower Side Water Resistant: 5 Atmospheres, 50 m/165 ft Dial: Black with Black Tachymeter, Steel Applied Markers with White Luminous Hands: Steel Propeller with White Luminous Strap: Handmade Alligator