In short, a chronograph is a complication to measure limited durations of time plus a chronometer is a superior-precision watch, Licensed by an official organisation. They're various but not antagonist principles. In 1675, Huygens and Robert Hooke invented the spiral equilibrium spring, or even the hairspring, built to Manage the http://stop-watch82581.designi1.com/4951245/the-5-second-trick-for-time-piece