Casio Edifice EF-550BK-1AV

Mineral GlassPartial ion platedRetrograde dialTachymeterScrew Lock CrownScrew Lock Back100-meter water resistanceCase / bezel material: Stainless steelResin Band1/20-second stopwatchMeasuring capacity: 59'59.95''Measuring mode: Elapsed timeDate displayRegular timekeepingAnalog: 3 hands (hour, minute, stopwatch seconds)3 dials (timekeeping 24-hour, timekeeping second / stopwatch 1/20 second, stopwatch minutes)Accuracy: ±20 seconds per monthApprox. battery life: 2 years on SR927W