BrandRolexCollectionGMT Master IINicknameBatmanMovementKinetic (Automatic)QualitySwissCaseBrushed stainless steel caseBackStainless steel snap-in back with Rolex authenticity stickerBezelBrushed stainless steel cutwork bezel with black Arabic numeral 24-hour markersCrownPolished stainless steel cutwork crown with Rolex logoBraceletBrushed stainless steel link bracelet with engraved deployment clasp with Rolex logo on topBand TypeStainless SteelWatch ClaspSecurity ClaspGlassSapphire CrystalColorSilverDial ColorBlackGenderMenDiameter48 x 40 mmBracelet Length119 x 20 mmCase Thickness14 mmQuality & TrademarkAll our Swiss grade watches are water resistant but not waterproof; we do not recommend swimming with them or taking showers with them. Taking the watches underwater will revoke their guarantee. Swiss watches are waterproof up to 30 meters.