NT TECHNOLOGY: 0510, Quartz A movement powered by a battery. The quartz crystal regulates the time achieving accuracy to 20 seconds a month. CASE WIDTH (MM): 38 CRYSTAL: Spherical crystal glass WATER-RESISTANCE: W.R.5BAR DIAL: Gold BAND TYPE: Bracelet, Stainless Steel CASE MATERIAL: Stainless Steel Analog Display "C-3PO" on the case back