Final comments- Water resistance is determined in laboratory conditions at a specific depth / pressure.
Keep your use in line with the ratings of the watch. Remember the watch is tested in still water; swimming and diving increases pressure dramatically. Avoid temperature extremes or shocks. Accidental exposure is one thing; hot tubs, saunas and the like are a no-no. Chemicals work their way into watch cases, gaskets and bands and starts corrosion which leads to premature failure.
Have your watch checked regularly for water resistance
Divers - I do not recommend using a mechanical watch as a dive watch. Use a dive computer or other instrument specific to the task, your life depends on it. If you use a mechanical watch rated for diving have it checked regularly at the manufacturer’s service center or a professional dive shop.. Return to: Watch repair FAQ Depth chart