Watch Information Case / bezel material: Stainless steel Double-lock, 1-press, 3-fold Clasp Solid Band Stainless Steel Band Screw Lock Back Screw Lock Crown Tachymeter Mineral Glass / Spherical Glass Retrograde dial Partial ion plated 100-meter water resistance 1-second stopwatch Measuring capacity: 4:59'59 Measuring mode: Elapsed time Day, date display Regular timekeeping Analog: 3 hands (hour, minute, stopwatch seconds), 3 dials (timekeeping second, stopwatch hours, stopwatch minutes) Accuracy: ±20 seconds per month Approx. battery life: 5 years on SR927W Size of case / Total weight Size of case : 51×49.3×14.1mm