Key Takeaways
- Automatic watches require periodic servicing to maintain accuracy and protect the movement - this is not optional maintenance, it is fundamental to the watch's longevity.
- The most common signs that a service is due include timekeeping inaccuracy, reduced power reserve, unusual sounds, and difficulty winding.
- Manufacturer service intervals vary, but many Swiss manufacturers recommend professional servicing every four to five years under normal conditions.
- Visible moisture inside the crystal, a loose or stiff crown, and erratic second-hand movement are all indicators that should prompt immediate attention from a qualified watchmaker.
- Proper daily storage and care - including the use of quality watch accessories - can extend the interval between services by reducing unnecessary stress on the movement.
- Ignoring early warning signs typically leads to more extensive and costly repairs down the line.
Automatic watches are remarkable pieces of engineering. They run on mechanical energy, contain dozens or hundreds of individual components, and in many cases they keep functioning reliably for decades with the right care. But "right care" is the operative phrase. Like any precision mechanical device, an automatic movement needs periodic professional attention to continue performing as it should.
The challenge for most collectors is knowing when that time has come. Unlike a car, there is no service light on a mechanical watch. The signals are subtler, and if you are not paying attention, it is easy to dismiss early warning signs as normal variation rather than as indicators of a movement that needs help.
At Lux Watch Care, we work with watch enthusiasts across Australia who care deeply about the condition and longevity of their pieces. This post covers the key signs to watch for, what each one typically indicates, and why acting on them sooner rather than later is almost always the right call.
Why Automatic Watches Need Servicing
Before getting into the specific signs, it is worth understanding why servicing is necessary in the first place. Inside an automatic movement, dozens of tiny components interact continuously, many of them under spring tension or in constant contact with each other. These components are lubricated with specialised oils and greases applied in very precise quantities to very specific locations.
Over time, those lubricants degrade. They can dry out, thicken, migrate away from where they were applied, or attract microscopic debris that gradually becomes abrasive. Once lubrication breaks down, metal components that should be gliding against each other begin to create friction. That friction produces wear, and wear compounds over time into measurable damage.
Servicing reverses this process. A qualified watchmaker disassembles the movement, cleans every component ultrasonically, inspects for wear or damage, replaces any parts that have degraded beyond acceptable tolerances, reapplies fresh lubricants, reassembles the movement, and regulates its timekeeping. Done at appropriate intervals, this process can extend the life of a fine movement considerably.
Sign 1: The Watch Is Losing or Gaining Time Noticeably
All mechanical watches gain or lose a small amount of time each day. This is normal and expected - the accuracy tolerances for a standard automatic movement are wider than those of a quartz watch, and most manufacturers specify acceptable daily variation within a range of a few seconds. If your watch has always kept time within a consistent narrow range and that suddenly changes, that is worth noting.
If your watch begins losing or gaining significantly more time than it used to - particularly if the change is sudden rather than gradual - this can indicate that lubricants have degraded to the point where the escapement or balance wheel is affected. Both components are central to timekeeping, and changes in how they operate will show up as timekeeping irregularities.
A watch that was previously accurate to within a few seconds per day and begins losing 30 or 40 seconds per day without any obvious explanation has usually reached a point where professional assessment is warranted.
Sign 2: The Power Reserve Has Shortened
Every automatic movement has a power reserve - the amount of time it will continue running from a full wind without additional motion. If your watch previously ran for 48 hours after being fully wound, and you notice it now stops after 24 or fewer, that shortening of the power reserve is a meaningful signal.
A reduced power reserve can indicate problems with the mainspring itself, issues with the winding mechanism, or degraded lubrication in the gear train that is creating drag. In any of these cases, a watchmaker can identify and address the underlying cause.
This symptom is also one of the reasons we encourage collectors to understand their specific movement's rated power reserve when they purchase a watch. Without knowing the baseline, it is difficult to assess whether a change has occurred. Our post on what happens to an automatic watch when it runs out of power provides useful context around power reserve and what running down regularly can mean for a movement over time.
Sign 3: The Watch Stops Unexpectedly While Being Worn
An automatic watch worn regularly by an active person should stay wound through the natural motion of the wrist. If your watch is stopping during the day - not after sitting unworn, but while you are wearing it - that suggests the rotor or winding mechanism is not efficiently transferring energy to the mainspring.
Possible causes include a worn or damaged rotor bearing, a problem with the winding pawls that engage the ratchet wheel, or significant lubrication degradation in the winding train. None of these are things you can address at home - they require proper disassembly and inspection.
Sign 4: Unusual Sounds From the Movement
A healthy automatic movement is not completely silent - you can often hear the soft sweep of the rotor and the tick of the escapement. What you should not hear is grinding, rattling, clicking at irregular intervals, or any sound that is new and unfamiliar.
A grinding or gritty sound during winding can suggest debris inside the movement or worn components creating metal-on-metal contact. A rattling sound might indicate a loose part. Any sound that was not there before and cannot be attributed to normal operation should be assessed by a watchmaker promptly, as continued running in that condition can accelerate damage.
Sign 5: Moisture or Condensation Inside the Crystal
This one is straightforward: if you can see moisture, fogging, or condensation on the inside of the crystal, the watch needs immediate professional attention. Moisture inside the case means the water resistance seals have failed, and the movement is being exposed to humidity that can cause corrosion and damage to delicate components very quickly.
Do not wait and see whether the condensation clears. Remove the watch from your wrist, avoid winding or operating it, and take it to a qualified watchmaker as soon as possible. The seals will need to be replaced, the movement inspected for any moisture-related damage, and the watch pressure-tested before it should be worn again.
Maintaining the water resistance of a watch over time requires periodic seal replacement regardless of visible signs, which is typically included as part of a full service.
Sign 6: The Crown Feels Different Than Usual
The crown - the small knob used to set the time and date - should operate with a consistent feel. Pulling it out to different positions should engage cleanly, and turning it should feel smooth and offer appropriate resistance.
If the crown has become noticeably stiffer than usual, or alternatively much looser and easier to turn than it should be, that is worth having checked. Stiffness can indicate a problem with the stem or setting mechanism. Looseness can suggest the crown is not engaging correctly with the movement's setting components. Either variation from normal should be flagged to a watchmaker.
A crown that pulls out or pushes in without the usual tactile click is also worth attention, as proper crown engagement is part of maintaining water resistance and protecting the movement from dust and moisture.
Sign 7: The Seconds Hand Moves Erratically
A healthy automatic movement should produce a smooth, consistent sweep of the seconds hand (or a consistent tick if the movement beats at a lower frequency). If the seconds hand begins jumping, stuttering, moving in uneven steps, or stopping and starting, that points directly to problems in the escapement or balance wheel - the heart of the movement's timekeeping function.
This symptom should be treated as urgent rather than monitored. Erratic escapement behaviour can worsen rapidly, and continuing to run the watch in that state risks damaging components that are expensive to replace.
Sign 8: Time Since Last Service
Sometimes there is no dramatic symptom at all - the watch is simply overdue for service based on elapsed time. Most major Swiss manufacturers recommend servicing automatic movements every four to five years under normal wearing conditions, though recommendations vary by manufacturer and movement type. Some robust movements may tolerate longer intervals in practice, but this depends heavily on how the watch has been stored and used.
If you cannot remember the last time your watch was professionally serviced, or if you have owned the watch for several years without any service history, it is reasonable to have a watchmaker inspect it even in the absence of obvious symptoms. Preventive servicing at appropriate intervals is far less costly than waiting until significant wear has occurred.
The Role of Proper Storage Between Services
How a watch is stored and cared for between services has a genuine impact on how quickly lubricants degrade and how much wear accumulates. A watch left sitting completely static for months at a time in poor storage conditions places different stresses on the movement than one that is worn regularly or kept moving in a quality winder.
Our range of automatic watch winders is designed to keep movements running consistently when watches are not being worn, which contributes to even lubrication distribution across the gear train. For pieces in longer-term passive storage, our leather watch boxes and storage solutions protect against dust, humidity fluctuations, and physical damage that can accelerate the need for servicing.
For a practical overview of home care practices that support movement health between professional services, our guide on maintaining mechanical watches between professional visits is a useful reference.
Two specific products worth considering for active storage are the single slot automatic watch winder with Mabuchi mute motor for quiet, consistent daily winding, and the single watch winder wooden box with glass display for collectors who want both function and presentation. For pieces not in active rotation, a portable genuine leather single slot watch case provides considered individual protection.
When to Act
The general principle is: when in doubt, have it looked at. A qualified watchmaker can inspect a movement and give you an honest assessment of its condition without necessarily committing to a full service. If a service is not yet needed, a good watchmaker will tell you that. If one is needed, knowing sooner rather than later means the work can be done before minor issues become major ones.
At Lux Watch Care, we understand that your watches represent a meaningful investment - financially, and often personally. The accessories and storage solutions we offer are one part of a broader approach to watch care. Professional servicing at appropriate intervals is the other essential component that no storage solution can replace.
If you have questions about watch care, storage solutions for your collection, or anything else related to keeping your timepieces in excellent condition, we would be glad to hear from you.
Get in touch with the Lux Watch Care team here
Frequently Asked Questions
How often should an automatic watch be serviced?
Most major Swiss watch manufacturers recommend servicing automatic movements every four to five years under normal conditions. This interval can vary depending on the specific movement, how frequently the watch is worn, how it is stored, and whether any symptoms of wear have appeared. If you are unsure, a watchmaker can inspect the movement and advise based on its current condition.
What happens if I don't service my automatic watch?
Without periodic servicing, the lubricants inside the movement degrade over time. Dried or migrated oils cause increased friction between components, which leads to accelerated wear. Over time, this can result in damaged or worn parts that require replacement, making the eventual service more extensive and costly than it would have been if done at the appropriate interval.
Can I service my automatic watch myself?
Servicing a mechanical watch movement requires specialist tools, training, and access to the correct lubricants applied in precise quantities to specific locations. It is not a task suited to home maintenance. Attempting to open and service a watch without proper training and equipment risks damaging components that are very difficult and expensive to replace. Professional servicing by a qualified watchmaker is strongly recommended.
Is it normal for an automatic watch to lose a few seconds per day?
Yes. Mechanical watches operate within broader accuracy tolerances than quartz watches, and a small daily gain or loss of a few seconds is normal and expected. Most standard automatic movements are specified to run within a range of approximately -4 to +6 seconds per day when regulated, though this varies by movement. A sudden or significant change from your watch's established timekeeping pattern is more meaningful than the absolute daily variation.
What causes an automatic watch to stop while being worn?
If an automatic watch stops during normal daily wear, the most likely causes are a worn or inefficient winding mechanism that is not keeping the mainspring charged through rotor movement, or a problem in the gear train that is preventing power from reaching the escapement. A watchmaker can identify the specific cause through inspection. Worn rotor bearings and degraded winding pawls are common culprits.
Does moisture inside the watch crystal mean the movement is damaged?
Not necessarily immediately, but moisture inside the case is a serious condition that requires prompt attention. Corrosion of movement components can begin relatively quickly once moisture has penetrated the case. The sooner the watch is taken to a watchmaker for drying, seal replacement, and movement inspection, the better the outcome is likely to be. Do not continue wearing or operating a watch with visible internal moisture.
How can I tell if my automatic watch's power reserve has shortened?
Fully wind the watch manually using the crown, note the time, and then leave it unworn in a stable position. Check when it stops. Compare this against the rated power reserve specified in your watch's documentation or on the manufacturer's website. If the watch stops significantly earlier than the rated reserve, the mainspring, winding mechanism, or gear train may need attention from a watchmaker.