There’s an indicator in your car showing when the fuel is about to run out and it’s time for us to head to the gas station. The power reserve indicator has a similar function in mechanical watches, showing the amount of power still reserved. In 1948, Jaeger-LeCoultre introduced a power reserve indicator designed for production in a series of watches called the Powermatic which utilized the LeCoultre Caliber 481. Thus, Jaeger-LeCoultre was  the first watchmaking company … Continue reading What is a Power Reserve Indicator?