ZenithEl Primero ChronomasterREF NUMBER: 03.1260.4021ZenithEl Primero ChronomasterREF NUMBER: 03.1260.4021ModelEl PrimeroCase Diameter45.0 mmDial NumeralRomanMovementMechanical AutomaticPower Reserve50 hManufacture Year-Dial MaterialBlackDial Movement CaliberZenith 4021Case MaterialStainless SteelWater Resistance30.0 m