Ratio FreeDiver GMT Series Sapphire Stainless Steel Black Dial Automatic RTF051 200M Men's Watch EN Quartz 100 meter water resistance for swimming classic design 100 meter water resistance for swimming and water sports Features: Stainless Steel Case Nylon Strap Swiss Automatic Movement Caliber: H 10 Sapphire Crystal Blue Dial Analog Display Power Reserve 12 24 hours Display Luminous Hands And Indexes Date Display Unidirectional Rotating Screw Down Crown Solid Case Back Buckle Clasp 100M Water Resistance Approximate Case Diameter: 40mm Approximate Case Thickness: 13mm combining dive watch durability with GMT traveler functionality Specification Details Model Number RTF051 Brand Ratio Collection FreeDiver GMT Series Gender Men's Movement Type Automatic (Self Winding Mechanical) Case Material Stainless Steel Case Shape Round Case Size Approximately 42mm (estimated) Crystal Sapphire Dial Color Black Band Material Stainless Steel Bracelet Type Three Link Oyster Style Bracelet Clasp Type Fold Over Safety Clasp Band Width Approximately 20mm (estimated) Lug Width Approximately 20mm (estimated) Lugs Count 4 Crown Type Screw Down Caseback Screw In Exhibition or Solid Estimated Weight Approximately 155g Water Resistance 200 Meters 660 Feet 20 ATM Bezel Unidirectional Rotating with 24 Hour GMT Markings Complications GMT Second Time Zone