Model: GC10100/CM50 30 PCSCase: 47mm Brushed Stainless Steel, Exhibition Back with Sapphire GlassCaliber: Automatic Valjoux 7750, Incabloc, Glucydur Balance, Nivarox Alloy HairspringFunctions: Hours, Minutes, Subsidiary Seconds, Day and Date. Chronograph: Hours, Minutes and Central SecondsCrown: Knurled, Double O-Ring SealedCrystal: Domed Sapphire Glass With Anti-Reflective Treatment on the Lower SideWater Resistant: 5 Atmospheres, 50m/165ft.Dial: Dark Grey with White Luminous NumbersHands: White Instrument with LuminousStrap: Handmade Classic Leather Strap, Ref: 22/20R-L-016Options: Handmade Alligator, Leather or Stainless Steel Bracelet