GMT Date, Self-winding mechanical movement beating at 25'200 vibrations per hour, with a monocrystalline silicon balance-spring power reserve up to 72 hours. Bi-directional rotating bezel Screw-in crown, Water-resistant to 10 bar, Scratch-resistant sapphire crystal, with several layers of anti-reflective coating on both sides. Anthracite dial, Swiss Super-Lumi Nova®.Stainless steel bracelet, With double safety folding clasp and push-piece opening mechanism. The LONGINES Spirit Zulu Time typifies the brands century-old expertise in timepieces with multiple time zones. Its origins and its name come from the first LONGINES dual time zone wristwatch manufactured in 1925, which featured the Zulu flag on its dialZulu referring to the letterZthat designates universal time for aviators. Aesthetically, the LONGINES Spirit Zulu Time stands out with its meticulous execution and the particular care given to the various details. It features a bidirectional rotating bezel with a ceramic inse