SEIKO Prospex GMT Automatic Diver SPB383J1

Calibre: 6R54 Power Reserve: 72 Hours Case Material: Stainless steel (Super Hard Coating) Case Thickness: 12.9mm Case Diameter: 42.0mm Case Length: 48.55mm Lug Width: 20.0mm Dial Colour: Black LumiBrite: Lumibrite on hands, indexes and bezel Clasp: Three-fold clasp with secure lock, push button release with extender Strap/Bracelet: Stainless steel (hard coating) Water Resistance: 20 bar Crystal Type: Sapphire Other Specifications: Screw-down crown