EF543D-1A

Case / bezel material: Stainless steelDouble-lock, 1-press, 3-fold ClaspStainless Steel BandSolid BandScrew Lock BackScrew Lock CrownTachymeterMineral Glass / Spherical 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