See detail @ An ideal watch for any dress occasion, the Ganymede's beautifully textured dial is a certain eye catcher. It's loaded with features: day, date, month, 24 hour and sunmoon indicators provide for a full calendar. And you can throw your watch batteries away. The automatic self-winding movement makes battery changes a thing of the past. Product description: Movement: Mechanical automatic self-winding, 21 jewel movement with E.E. signed rotor. The bridges and rotor are fine milled with a Côte de Geneve pattern. 36-hour autonomy. Case and dial: 316L mirror finished highly polished stainless steel case.