Named after the brand's home town in the Swiss Jura mountains, the Le Locle Powermatic 80 embodies 's tradition of craftsmanship. With a 39.3 millimeter 316L stainless steel & 18K rose gold, this elegant watch features a Powermatic movement and a power reserve of up to 80 hours. Its tireless work can be observed through the case's transparent caseback. This particular model is a COSC model meaning the movement has been certified for accuracy and precision by the Official Swiss Chronometer Testing Institute (COSC).