SeikoProspex SPB451J1 Blue Dial Stainless SteelREF NUMBER: SPB451J1SeikoProspex SPB451J1 Blue Dial Stainless SteelREF NUMBER: SPB451J1ModelProspex DiversCase Diameter40.0 mmDial NumeralStickMovementMechanical AutomaticPower Reserve72 hManufacture Year-Dial MaterialBlueDial Movement CaliberSeiko 6R55Case MaterialStainless SteelWater Resistance300.0 m