Frederique Constant FC-310MCK5B6 Classic Heart Beat 40mm Chronograaf without the stiffness you encounter

without the stiffness you encounter with many other NATO straps

Protection is abundant: sapphire glass

Protection is not lacking: mineral glass and water resistance up to 3 bar

a screwed-down crown and water resistance up to 5 bar

Design and style: Sporty diver's style combined with a timeless design that suits any occasion

Frederique Constant FC-310MCK5B6 Classic Heart Beat 40mm Chronograaf without the stiffness you encounterFrederique Constant was founded in Geneva in 1988 with one goal: to make Swiss watchmaking accessible without compromising on craftsmanship. This is reflected here in a round 40 mm silver stainless steel case, set against a black dial. It is powered by a Frederique Constant automatic movement (calibre FC 303), offering a power reserve of 38 hours and 26 jewel bearings. The automatic movement is wound by the movement of the wrist and therefore requires