SpecificationsCase / bezel material: Stainless steelGenuine Leather BandOne-touch 3-fold ClaspMineral Glass50-meter water resistanceIllumination Index (Black light LED)AfterglowRegular timekeepingAnalog: 3 hands (hour, minute, second), 3 dials (date, day, 24-hour)Accuracy: ± 20 seconds per monthApprox. Battery life: 3 years on SR621SW (Analog)3 years on CR1616 (Light 9 [sec / day])Size of case / Total weightSize of case: 41 × 34 × 10.8mmTotal weight: 40g