The Longines Big Eye Heritage Avigation Longines continues to keep a close and long-standing connection with the world of aviation. The brand has produced a large number of pilots' watches and chronographs, on-board equipment and other navigation instruments which aided the development of civil and military aviation during the first half of the 20th century. Today, Longines is bringing this exciting heritage back to life with watches from its "Heritage Avigation" range. Case Shape Round Material Stainless steel Glass Scratch-resistant sapphire crystal, with several layers of anti-reflective coating on the underside Case Back Screw-down case back Dimension Ø 41.00 mm Lug distance 20 mm Thickness 14.50 mm Water Resistance Water-resistant to 3 bar Weight 98.2 g Dial & hands Dial color Black Hour markers Painted Arabic numerals Hands Silvered sandblasted hands Specificities Swiss Super-LumiNova® Movement & Functions Movement Type Automatic Functions Hours, minutes, small seconds at 9 o'clock Caliber L688 Movement Description Self-winding mechanical movement beating at 28'800 vibrations per hour, with a power reserve up to 66 hours Chronograph Column Wheel Chronograph Chronograph Functions Chronograph mechanism: central 60 seconds hand, 30 minutes counter at 3 o'clock and 12 hours counter at 6 o'clock Strap Material Leather strap Color Brown Buckle With buckle Condition Worn and in very good condition Few scratches on the caseback (according to pictures) No papers Will be shipped in a Longines original travel box