Certina Crowns Ø4mm & Over

Certina - Crowns Dimensions:

• Tap Size
• Crown Diameter
• Pendant Tube Diameter

The initials "DS" stand for “Double Security”. This concept can be identified by the toughened case, a sapphire crystal and special seals in the crown the stem and case back. This process confers on the watch an exceptional resistance, even under extremely demanding conditions.