Movement Accuracy:-15/+25 seconds per day Calibre:6R54 Movement Type:Automatic with Manual Winding Power Reserve:72 Hours Exterior Dial Colour:Green LumiBrite:Lumibrite on hands, indexes and bezel Case Material:Stainless steel (Bezel: Stainless steel with ceramic display) Strap/Bracelet:Stainless steel (hard coating) Clasp:Three-fold clasp with secure lock, push button release with extender Case Diameter:42.0mm Case Thickness:12.9mm Case Length:48.55mm Lug Width:20.0mm Other Specifications Water Resistance:20 bar Crystal Type:Sapphire crystal Other Specifications:Screw-down crown, Unidirectional rotating bezel Watch Function:Stop seconds hand function, GMT