RolexExplorer II 16550 / WhiteREF NUMBER: 16550RolexExplorer II 16550 / WhiteREF NUMBER: 16550ModelExplorer IICase Diameter40.0 mmDial NumeralNo NumeralsMovementMechanical AutomaticPower Reserve48 hManufacture Year-Dial MaterialWhiteDial Movement CaliberRolex 3085Case MaterialStainless SteelWater Resistance100.0 m