Longines Sport/Aviation Collection Swiss Made Automatic Watch With A Blue Calf Leather Strap, Stainless Steel 40mm Case & A Sunray Blue Coloured Dial With Date Window. The Pioneer Spirit Lives On Historically, Longines has accompanied legendary pioneers as they conquer air, land and sea. Today, the winged hourglass brand has drawn inspiration from this heritage to create Longines Spirit, a collection with an impeccable pedigree. This collection links history with innovation by combining references to the glory days of aviation with present-day aesthetic and technical requirements. These resolutely contemporary timepieces are a testimony to the pioneering spirit that has inspired the brand since its earliest days. A glowing tribute to these exceptional men and women who, by a record, an exploit or a display of courage, have left their mark on history - pushing new generations to surpass themselves. Glass: Scratch-resistant sapphire crystal, with several layers of anti-reflective coating on both sides Lug Distance: 21 mm Weight: 83.5 g Hands: Silvered sandblasted hands Specificities: Swiss Super-LumiNova® Caliber: L888.4 Movement: Self-winding mechanical movement beating at 25'200 vibrations per hour, with a monocrystalline silicon balance-spring power reserve of approximately 72 hours Functions: Hours, minutes, seconds and date Special Functions: Chronometer certified by the COSC