Seiko Prospex Automatic Grey Dial Stainless Steel Bracelet Men's Watch SPB243. Item SpecificationCrystalCurved Sapphire Crystal with Anti-Reflective coating on inner surfaceResistanceWater ResistantDialBlackCaliber Number6R35LumiBriteLumibrite hands,Indices MovementAutomatic with manual winding Precision 25 to -15 seconds per dayClaspTri-fold push button releaseJewels24Size12.9mm x 38.0mm x 46.2 mmDisplayDateCase MaterialStainless steel Weight146 gPower ReserveApprox 70 HoursOther SpecificationsScrew-down crownSee-through screw case back