featureUnidirectional rotating bezelSmall secondsdateMaster Chronometer CertifiedScrew-down crownTime zone functionTransparent case back??caseTotal product weight (approx.):????121 gBetween lugs:????21 mmThickness:????14.1 mmCase:????Stainless steelCase diameter:????43 mmWater resistance:????15 bar (150 m / 500 ft)??Dial and CrystalDial color:????blueMirror:????Arched wear-resistant sapphire crystal, double-sided anti-reflective treatment??braceletMaterial:????Rubber strapStrap color:????blueStrap bottom:????RubberClasp type:????Folding claspBuckle material:????stainless steel