Japanese quartz OS21 3-Hand Chronograph Professional MovementChronograph features minute hand, 24-hour hand, and 3-date windowRatcheting bezelStationary Crown ProtectorWater-resistant to 165 feet (50 M)

Japanese quartz OS21 3-Hand Chronograph Professional MovementChronograph features minute hand, 24-hour hand, and 3-date windowScrew down crown, pushers and case backRatcheting bezelWater-resistant to 330 feet (100 M)

Japanese quartz OS11 3-Hand Avionautic Chronograph MovementChronograph features minute hand, secondary second hand, and 3-date window24-Hour bezelFlip-up crown protectorWater-resistant to 165 feet (50 M)

Quality Japanese-quartz movementCurved Mineral crystal with Gilt Metalized RimMoisture resistant

Japanese quartz OS20 3-Hand Chronograph Professional MovementChronograph features minute hand, secondary second hand and 24-hour handTachymeter on bezelDate windowWater-resistant to 165 feet (50 M)