The dive watch is the ultimate “tool” watch — tough, purpose-built, utilitarian — even if most examples never get near a coral reef. But while a good dive watch is resilient, it’s not invincible; even dedicated landlubbers need to keep in mind the watch’s particular features and vulnerabilities. Here’s what you need to know before you take the plunge, literally or financially.
1. Wind a hand-wound mechanical watch according to the instructions for its movement; there is no universal required time of day.
2. If an automatic watch has insufficient power, follow its movement instructions for manual winding where supported. The required number of crown turns varies by calibre.
3. Power reserve varies by model. If the watch stops after not being worn, restart and set it according to its instructions.
4. Regardless of the waterproof performance of the watch, you should try to avoid getting water, if it gets water, please wipe the water dry in time, and make sure the crown is locked at all times. It is best to replace the waterproof ring once a year.
Screw Down the Crown
Most dive watches feature crowns that screw into a tube fitted into the watch case, which, in turn, features a seal that prevents water from entering. But if the crown isn’t fully locked down when you go diving, water may find its way into the watch, possibly ruining the movement and resulting in a costly service.
Know Your Resistance
Standard 6425 from the International Standard for Organization defines a diver’s watch as “designed to withstand diving in water at depths of at least 100m.” If you’re not sure about your own timepiece, check the dial; if a watch is not rated to at least that standard, there’s a good chance it’s noted there. Under the century mark? A quick dunk in the pool is probably fine but repeated submergence is asking for trouble.
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