EF550PB-7A

Case / bezel material: Stainless steelResin BandScrew Lock CrownScrew Lock BackRetrograde dialTachymeterMineral GlassPartial ion plated100-meter water resistance1/20-second stopwatch Measuring capacity: 59'59.95'' Measuring mode: Elapsed timeDate displayRegular timekeeping Analog: 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