Watch Specification Model: SD1975W Movement: Japan NH36 automatic Movement features: 3 pins/week/calendar, frequency 21600 times per hour (3Hz), stop second device, two-way automatic winding, 24 stone, 41 hours of energy storage. Case material: 316L stainless steel Case back: 316L stainless steel Bezel: 120 click unidirect rotational ceramic bezel Watch mirror: sapphire crystal with AR coating. Water resistance: 300m / 30 ATM Luminous: Swiss BGW9 blue luminous. Crown: Screwdown Crown Case back: Screwback Case Watch Dimension Case diameter: 47.5mm ( without crown) Case length: 44mm (lug to lug) Case thickness: 15mm Lug width: 22mm 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