Mineral Glass Screw Lock Back 100-meter water resistance Case / bezel material: Stainless steel Stainless Steel Band One-touch 3-fold Buckle Solid Band Regular timekeeping Analog: 3 hands (hour, minute, second), 4 dials (month, date, day, 24-hour) Accuracy: ±20 seconds per month Approx. battery life: 3 years on SR621SW Size of case: 49.5 X 38.5 X 9.7 mm total weight: 125 g 100-meter water resistance Stainless steel case and solid band Luminous hour and minute hands Screw Lock BackÂ