In a striking all-blue style, this Longines Spirit Automatic Chronometer Chronograph Men\'s Watch pays tribute to the pioneers of aviation whilst staying on-trend. At A Glance  Presented on a blue leather strap with white stitching 42mm case size with 100m water resistance Sunray blue dial with polished bezel Applied Arabic numerals filled with Swiss Super-LumiNova and date window at 4 o\'clock Chronograph sub dials and silvered sandblasted hands Scratch resistant sapphire crystal glass with several layers of anti-reflective coating on both sides Powered by a Swiss automatic movement Chronometer certified by COSC