While https://www.rbzonnebril.com/zonnebril/aviator-classic/ both mainspring barrels are https://www.rbocchialidasole.com/occhiali-da-sole/rb3746/ independent of one another, they are each wound separately. Conventional timekeeping is wound through the rotor or by turning the crown counterclockwise, https://www.rbsunglasses.uk.com/product-sunglasses/wayfarer-folding-classic/ while the chronograph can only be wound by manually turning the crown clockwise – it takes about 50 winds to fully power the chronograph. To track chronograph running time, a power reserve is located underneath 12 o'clock.