Timex Marlin® Automatic 40mm Leather Strap WatchAutomatic Soul Ticking inside this iteration of our iconic 1960s Marlin is a tried and true 21 jewel automatic movement, creating a contemporary timepiece that honors our watchmaking history. Powered by your motion as you wear the watch, the movement can store a maximum 40 hours of energy. If motionless longer than 40 hours, wind the watch using the crown until you feel resistance, set the time, and place it back on your wrist where every motion will