Watch Specification Model:SD1970S Movement: Japan NH35 automatic, 41 hours of energy storage. Case material:Germany Cusn8 bronze Case back: 316L stainless steel Bezel: 120 click unidirect rotational ceramicbezel 120 click unidirect rotational bronze bezel Watch mirror: sapphire crystalwith AR coating. Water resistance: 200 m /20 ATM dial: V1 version: bronze edge applied indices V2: stainless steel edge applied indices Luminous: Lates batch is Swiss BGW9 blue super luminousfor bezel and C3 green lume is Dial Crown: Screwdown Crown Case back:Screwback Case Watch Dimension Case diameter:43.8mm(withoutcrown) Case length: 46.8mm(lug to lug) Case thickness: 13.5mm Lug width: 20mm Our service Warranty:2 years Returns policy:30-day return and refund, Style: automatic watch, dive watch, luxury watch Package: watch, box,warranty card, user manual