Longines Sport Collection Swiss Automatic Chronometer Watch With A Grey Titanium Bracelet Strap, Anthracite Coloured Dial & Date Window. Longines Spirit in the Titanium Age The Longines Spirit collection has taken a new step forward with timepieces forged from titanium, in homage to the world of aviation where the collection originated. The combination of a strong, sleek aesthetic and state-of-the-art technology gives these new models exceptional character. Proof that the pioneering spirit is still, and always, alive and well at the winged hourglass brand. Clasp: With triple safety folding clasp and push-piece opening mechanism Interchangeability: Easily change your bracelet/strap thanks to the Longines interchangeable system Movement Discription: Self-winding mechanical movement beating at 25'200 vibrations per hour, with a monocrystalline silicon balance-spring power reserve of approximately 72 hours Special Function: Chronometer certified by the COSC Specifications: Swiss Super-LumiNova® Dimension: 42.00 mm Thickness: 12.20 mm