featureUnidirectional rotating bezelSmall secondsdateMaster Chronometer CertifiedScrew-down crownTime zone functionTransparent case back??caseTotal product weight (approx.):????96 gBetween lugs:????20 mmThickness:????13.2 mmCase:????Stainless steelCase diameter:????41 mmWater resistance:????15 bar (150 m / 500 ft)??Dial and Crystal??Dial color:????SilverMirror:????Arched wear-resistant sapphire crystal, double-sided anti-reflective treatment??tapeStrap type:????leather strapStrap color:????BrownStrap surface:????Ungrained calfskinStrap bottom:????Ungrained calfskinClasp type:????Folding claspBuckle material:????stainless steel