SRPD23K1 ExteriorCase Material - Stainless steel (hard coating)Glass Material - HardlexDiameter: 43.8㎜MovementCaliber Number - 4R35Movement Type - Automatic with manual winding capacityDuration - Approx. 41 hoursAccuracy+45 to -35 seconds per dayOther DetailsThree-fold clasp with secure lock , push button release with extenderLumiBriteLumibrite on hands and indexesWater Resistance200m / 660ft diver'sFeatures24 jewelsDate displayScrew case backScrew-down crownStop seconds hand functionThree-fold clasp with secure lockUnidirectional rotating bezel3 YEAR WARRANTY AUTHORIZED SEIKO DELAER