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WATER-RESISTANCEThe Mido′s watches are designed to be on the wrist 24 hours a day. For water-resistance to 3 bar(30m) and 5 bar (50m), Mido watches benefit from crowns with joints made of synthetic material. For water-resistance up to 10 bar (100m) or more, the crown is screwed down and the construction of the case is made differently in order to withstand higher pressure. Commander Models In 1934, Mido invented the unique Aquadura cork crown sealing system. It ensures complete water-resistance with a specially treated piece of natural cork, which is nestled around the crown shaft. A secret treatment keeps the cork moist and thus preserves its elasticity for years. Even if the crown is not fully pushed in, it is still water-resistant. Aquadura is designed for frequent contact with water up to 50 meters (5 bar) but not for deep water diving.
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