SEIKO 5 Sports Skx Gmt Bi-Colour Watch Stainless Steel Case Leather Strap Automatic Movement Caliber: 4R34 24 Jewels Hardlex Crystal Black Dial Analog Display GMT Power Reserve Up to 41 hours. This is the first SKX GMT within Seiko 5 Sports’ Specialist Style series. The Mocha colour scheme of this piece features a black dial, and black-brown combo bezel. The bezel has a gold colour plating.