8 Watch Myths Even Collectors Still Repeat

Old Wisdom, New Watches

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Watches come with a lot of folklore, much of it repeated by people who love them. Some myths began with real problems in older watches and then outlived the problem. Others grew from marketing language, such as waterproof and unbreakable, or from half-understood facts about movements and materials. They influence what people buy and how they care for their watches, and sometimes they lead to expensive mistakes, like wearing a fashion watch in the pool or skipping a service. The eight below are drawn from watch care guides, retailer and collector explainers and forum discussions. Several sources are retailer blogs, which carry some commercial bias, and a few answers rest on general watchmaking knowledge, so exact numbers should be checked against your own watch's documentation. Different movements and brands behave differently, and the manual for your model remains the best reference. The aim is not to make anyone distrust their watch, but to help owners treat it properly and understand what its claims mean. A watch is a small machine that rewards a little knowledge, and clearing up these myths can save both money and disappointment.

Myth: A 30-Meter Rating Means You Can Swim

A watch marked 30 meters or 3 bar sounds like it should survive a swim, but it will not. The rating is a laboratory pressure test, not a promise about depth, and it does not account for movement in water, which creates higher pressure. Retailers and watch guides agree that a 30-meter rating means the watch can handle minor splashes, such as rain or washing hands, not swimming or submersion. A watch described as water resistant to 3 bar is essentially splash-proof, as one guide puts it. For swimming, sources recommend a watch tested to at least 5 bar, with others suggesting 10 ATM, or about 100 meters, for regular swimming, and 20 ATM or more for diving, with a screw-down crown and the proper bezel. Hot showers and saunas are hard on seals because steam and heat can penetrate and soap can degrade gaskets. Ratings assume that the crown and pushers are fully closed. If you plan to be near water often, choose a watch built for it. The number is a guide to the design, not an invitation to test it.

Myth: Waterproof Is Forever

The word waterproof is rarely accurate, and even a good water resistance rating fades. A watch's seals are rubber gaskets that dry, harden and compress with age, and heat, soaps, salt and chemicals speed up the process. The ISO 22810 standard recommends having a timepiece checked for water resistance every two to three years, as one source notes. A pressure test at a watchmaker can show whether the seals are still holding. Gaskets are normally replaced during a service, and some owners arrange a check before the summer swimming season. Knocks can also compromise a seal by shifting the crystal or crown. If you open the case back, or have the battery changed by someone who does not reseal it properly, the rating no longer applies. Do not operate the crown or pushers under water, and rinse a watch with fresh water after exposure to the sea. If you see condensation under the crystal, take the watch to a professional at once. The rating on the dial describes a watch when it was new and tested. It is not a lifetime guarantee, and it needs maintenance.

Myth: You Can Overwind an Automatic Watch

Owners often worry that winding an automatic watch by hand will break it. The concern comes from older mechanical designs, where winding a full mainspring too hard could damage the mechanism. One source on automatic watch care warns that overwinding can lead to wear and tear on the movement, so a little caution is reasonable. Many modern automatic movements include a slipping clutch or a bridle in the mainspring barrel that lets the spring slip when fully wound, preventing damage. In practice, turning the crown gently until you feel resistance is safe for most watches. The usual guidance is to wind a stopped automatic with about twenty to forty turns to start it, then let wearing keep it going. Do not force the crown, and stop when it feels tight. If you are unsure, the owner's manual explains the correct procedure for your movement. The myth persists because mechanical watches are delicate, but a little hand winding is part of normal use and not a threat to a modern movement.

Myth: An Automatic Never Needs Winding

Automatic watches wind themselves from the motion of the wearer's wrist, which leads some owners to think they run forever. The mainspring stores energy, and when the watch is not worn, it runs down. A typical mechanical watch holds a reserve of about thirty-eight to eighty hours, according to watch guides, after which it stops. If you rotate between watches, one may sit for days and need winding and setting again. Watches worn only occasionally or by people who are sedentary may not receive enough motion to keep a full charge. A few minutes of hand winding or a short period on a watch winder can top it up. Winders are optional and not necessary for most owners. Check the power reserve indicator if your watch has one. Letting the watch run down is not harmful, but it does require resetting the time and date. Some owners enjoy the ritual of winding, and others prefer a quick shake or a few crown turns. The term automatic means self-winding, not self-sufficient. It describes how the energy gets in, not whether the watch needs attention.

Myth: Only Vintage Watches Get Magnetized

Magnetism is a real hazard for mechanical watches, and many people assume it only affects old ones. One source calls the idea that only vintage watches are susceptible widespread but inaccurate. Magnets are everywhere now, in phone cases, laptop clasps, speakers, handbag closures, fridge doors and tablet covers. A watch that spends time near one can have its hairspring magnetized, causing the coils to stick together and the watch to run fast, sometimes by minutes per day. Modern watches with antimagnetic materials such as silicon hairsprings are far more resistant, but they are not immune to strong fields. Keep watches away from speakers and magnetic clasps. If your watch suddenly gains time, magnetism is a likely cause. The good news is that the effect is reversible. Another explainer notes that magnetism does not cause lasting damage, and a watchmaker can demagnetize a watch in seconds with a simple tool. Some hobbyists buy a small demagnetizer for home use. The myth is partly true: older watches are more vulnerable, but any mechanical watch can be affected.

Myth: Sapphire Crystal Cannot Be Scratched or Broken

Sapphire crystal is the premium material for watch glass, and its reputation for toughness is well earned. It is extremely hard, rating nine on the Mohs scale, just below diamond, so ordinary dust, keys and desks will not scratch it the way they scratch mineral glass or acrylic. Many watch lovers call it scratchproof. It is not unbreakable. Sapphire is brittle, and a hard impact can chip or crack it, particularly at the edges, and a sharp blow on a hard corner can shatter it. Anything harder than sapphire, such as diamond or some industrial abrasives, can scratch it. Some sapphire crystals have anti-reflective coatings that can scratch or wear, even when the sapphire underneath is intact. The material is also more expensive to produce and replace. For daily use, sapphire is excellent, but it should not be treated as armor. Avoid hitting the watch against door frames and countertops. If it does crack, replacing a crystal is a common watchmaker job, and the cost depends on the shape and the coating. The best description is very scratch-resistant, not indestructible.

Myth: Mechanical Watches Are More Accurate Than Quartz

The romance of a mechanical movement can lead people to believe it is also more accurate, but a basic quartz watch is far more precise. A typical quartz watch is accurate to within about fifteen seconds a month, while a good mechanical watch might gain or lose several seconds a day. Mechanical accuracy depends on temperature, position, magnetism and the state of the mainspring. Some mechanical watches are certified as chronometers by independent testing and meet tighter standards, but they remain less accurate than most quartz. The charm of a mechanical watch lies in craftsmanship, engineering and the way it works without a battery, not in precision. Quartz watches are also generally cheaper, more durable and easier to maintain. High-end quartz and radio-controlled watches are even more accurate. The question to ask is what you value in a watch. If it is precision, a quartz model wins; if it is the pleasure of owning a miniature machine, a mechanical watch has its own appeal. Comparing the two on accuracy alone is like comparing a hand-built bicycle and a motorcycle for speed.

Myth: Swiss Made Means Everything Is Swiss

The label Swiss Made carries prestige, and many assume every part of the watch was produced in Switzerland. Swiss law sets minimum standards, not total origin. Under the rules, a watch qualifies if the movement is Swiss, the movement is cased up in Switzerland, the manufacturer carries out the final inspection in Switzerland and at least sixty percent of the manufacturing costs are Swiss, under the Swiss rules. That means some parts, such as straps, crystals, dials or components, may come from elsewhere, and the label is therefore not a guarantee of entirely local production. A Swiss movement means the movement itself meets similar thresholds. The label still has value, as it is regulated, and it indicates a certain level of local manufacture and quality control. Other labels, such as Swiss Movement or Swiss Parts, have different meanings and carry fewer requirements. The best way to understand a watch is to read the brand's description and ask where the movement is made. The rules were tightened in recent years to strengthen the meaning of the label. It is a useful signal, but not the whole story.

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