Overview This is the SD1903which pays tribute to the Zenith Pilotwatch which commemorates the Wright Brothers' first flight and was a limited edition of 1903 pieces.This is lovely looking watch with real presence and benefits from the following spec: Watch Specification: Model:SD1903S Movement: Japan NH35 automatic, 41 hours of energy storage. Case back: 316L stainless steel Case material: 316L stainless steel Watch mirror: sapphire crystalwith AR coating. Water resistance: 200 m / 20 ATM Luminous: Swiss C3, Green light Crown: Screw-Down Watch Dimension: Case diameter:46.5mm(without crown) Case length: 54.17mm Case thickness: 14mm Lug width: 22mm Our Service: Warranty: 2years Returns and Refund: 30 days return & refund service Package: watch,warranty card, user manual, plastic protecting box Style: mens mechanical watch, mens automatic watch, dive watch, luxury watch