The water resistance of watches is often mentioned in meters or BAR. But a watch such as has a classification of 100m (10BAR), does not in fact manage to dive to a depth of 100m. Without the meter value stated is not related to the diving depth but to the air pressure used during the water protection test, where 1 BAR corresponds to about 10m. In order for a watch to withstand bathing with it, it is recommended that it can withstand at least 100m / 10BAR and to be able to dive with it, it should withstand at least 200m / 20BAR.
Also keep in mind that the crown (adjusting screw) must be in position 1, ie closed position, for the watch to be tight. If it has not been closed, the guarantee does not apply if the watch should take in water. For watches with a classification below 100m / 10BAR, the guarantee generally does not apply if it takes in water, as they are only seen as waterproof, not waterproof.
Home / MEN'S WATCHES / Men's Watches by STYLE / Men's DIVING Watches
For almost as long as watches have adorned wrists, watchmakers have strived to make them work in places they probably shouldn't, and nowhere is that pursuit more glorified than with the diver's watch. And how could it not be? Imagine a tiny mechanism of gears and springs, operating flawlessly, shielded from the relentless pressure of the sea and surrounded by an unfathomable amount of water and force.
The quest for a truly waterproof watch began in earnest in the early 1900s. In 1927, Rolex debuted its "Oyster" model, widely accepted as the world's first waterproof watch. By the late 1930s, Panerai developed the Radiomir, a large "cushion-cased" watch worn by divers in the Italian Royal Navy, intended for extended periods underwater.
However, the modern diver's watch as we know it didn't emerge until 1953 when Rolex, Blancpain, and Zodiac introduced their diver's watch designs - the Submariner, Fifty Fathoms, and Sea Wolf, respectively - all different yet remarkably similar in features. All three watches featured thick waterproof cases, readable luminous dials, and rotating bezels that could be used to calculate dive times. This last component is the essence of why the diver's watch became such an essential part of a diver's SCUBA kit: it allows divers to know exactly how much time they have spent underwater and when it's time to begin their ascent.
While initially intended as tools for military and commercial divers, recreational diving became an immensely popular hobby in the following decades, and more and more diver's watches would appear on the market following the same formula as those from 1953, with the same hallmarks of design and features. Although watchmakers continue to refine this formula - with tougher cases, more extensive depth ratings, and other practical features - many of the diver's watches you see today are still inspired by those first launched over 60 years ago.
The reality is this: the diver's watch was largely supplanted by the modern digital dive computer long ago. Today, there are still those who wear them (likely as a backup to a dive computer), but for the most part, diver's watches are worn as a style rather than a tool for divers, which is perfectly fine, as they retain their old-school style but can still serve their intended purpose if needed.
Today, many watches can be worn and read underwater, but the best guidelines for what constitutes a true diver's watch are established by the International Organization for Standardization (ISO). The modern ISO 6425 standard prescribes some criteria, the most important of which are: a minimum depth rating of 100 meters, a unidirectional rotating bezel with markings at least every five minutes, a dial visible in total darkness, and an indication in the dark that the watch is running - typically indicated by a second hand with a luminous tip or counterweight. ISO 6425 also stipulates that the watch must be anti-magnetic and shock-resistant, as well as corrosion-resistant in seawater. The result is a watch that is rugged, reliable, and legible.
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