Showcasing a timeless design inspired by the 1940s, this Longines Heritage Classic Automatic Chronograph Men\'s Watch adds classic style to your look. At A Glance  Presented on a black leather strap 40mm case size with 30m water resistance Black dial with tachymetric scaled bezel Arabic hour markers with silver chronograph sub dial Scratch-resistant sapphire crystal, with several layers of anti-reflective coating on the underside Powered by a Swiss self winding mechanical movement Up to 54 hours power reserve