Movado 1881 Automatic, 39mm stainless steel case with blue textured dial and black calfskin leather strap. Caseback features an exposed automatic movement. Automatic watches do not contain batteries. They are charged by the movement of your wrist. If the watch is not worn it will stop running in about 38 hours. To get it started, turn the crown clockwise about 20-30 times until the second hand starts moving. You will most likely need to reset the time and date.