Automatic Movement: Mechanically Powered And Wound By The Motion Of The Wearer's Arm Or Manual Winding Blue Genuine Leather Strap Strap Buckle Clasp Stainless Steel Bezel Encrusted With Crystal Stainless Steel Case Sapphire-Coated Mineral Crystal Push/Pull Crown Blue Dial With Luminous Blue Hands Date Display Case: 54Mm X 38Mm X 13Mm Bracelet/Strap: 18Mm Wide X 8.26In Long Water-Resistant Up To 50 Meters Manufacturer's Limited Warranty It Is Customary To Treat Most Gemstones To Achieve Enhanced Color And Durability. Some Of These Treatments May Not Be Permanent, And May Require Special Care.