Amazon.com: Bulova Ladies。Beautiful watch, kept in great condition! Automatic in stainless steel with 5 diamonds individually hand set on white mother-of-pearl dial with open aperture, exhibition case back, automatic heart-beat movement with 40-hour power reserve, domed sapphire crystal, stainless steel bracelet with double-press deployment closure, and water resistance to 30 meters. *Mother-of-pearl colors on dials can vary due to natural variations of the material. Light reflection creates an iridescent effect, causing colors to shift and change, making each dial unique in color and tone. Model #: 96P181 82S0 Automatic Powered by the release of a wound spring, mechanical movements never require a battery. Automatic mechanical movements have an oscillating weight that winds the spring with the motion of the wearer’s arm.