• Black ion plated band
• Black ion plated case
• Mineral Glass
• Screw Lock Back
• 100-meter water resistance
• Case / bezel material: Stainless steel
• Stainless Steel Band
• One-touch 3-fold Clasp

• 1-second stopwatchMeasuring capacity: 29'59Measuring mode: Elapsed time
• Date display
• Regular timekeepingAnalog: 3 hands

• Black ion plated band
• Black ion plated case
• Mineral Glass
• Screw Lock Back
• 100-meter water resistance
• Case / bezel material: Stainless steel
• Stainless Steel Band
• One-touch 3-fold Clasp

• 1-second stopwatchMeasuring capacity: 29'59Measuring mode: Elapsed time
• Date display
• Regular timekeepingAnalog: 3 hands (hour, minute, second),3 dials (timekeeping 24-hour, stopwatch seconds, stopwatch minutes)
• Accuracy: ±20 seconds per month
• Approx. battery life: 2 years on SR621SW
• Size of case: 56.6 × 49 × 12.7 mm
• Total weight: 198 g