Explainer
How often to service an automatic watch
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Short answer
Many watch makers suggest servicing an automatic watch roughly every 5 to 10 years, but the right interval depends on the brand, how often you wear it and how it runs. Follow your maker's recommendation, and service sooner if the watch loses accuracy, stops early, or fails a water resistance test. A full service cleans, oils and regulates the movement and replaces seals.
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An automatic watch is a small machine with oiled parts that wear slowly over years. Servicing keeps it running and protects it from damage. This page covers how often to service an automatic, the signs a service is due sooner, what a full service includes, and what drives the cost, so you know what to ask a watchmaker. It is for owners of anything from a Seiko 5 to a Swiss automatic. For how long a well serviced watch can last, see how long do automatic watches last.
Typical service intervals
There is no single rule. Watch brands publish their own recommendations, and they differ by maker and by movement. As a broad guide, many suggest a service somewhere between about 5 and 10 years. Your watch's manual or the maker's website is the best source for your model.
How you use the watch matters too. A watch worn daily or kept running on a winder accumulates running time faster than one worn occasionally. A watch used in salt water or exposed to knocks may need seals and water resistance checked more often than the movement needs attention.
| Situation | Plan |
|---|---|
| Runs well, worn regularly | Follow the maker's interval |
| Accuracy has drifted noticeably | Have it checked; may need regulation or service |
| Stops well short of its power reserve | Service soon |
| Used in water often | Pressure test yearly or before swim season |
| Bought used, history unknown | Consider a service early on |
Signs your watch needs a service sooner
- Accuracy changes. It runs noticeably faster or slower than it used to, beyond the maker's range. Rule out magnetism first; see magnetized watch fix.
- Short power reserve. It stops long before its listed reserve after a full wind. See automatic watch keeps stopping.
- Rough winding. The crown feels gritty, or the rotor sounds loud and rough.
- Moisture. Fog or droplets under the crystal. Get it seen quickly to limit rust.
- Date or day sticks. The calendar changes late, partially, or not at all.
- After a hard knock. Especially if timekeeping changed afterward.
What a full service includes
A full service, sometimes called an overhaul, usually follows the same steps at most watchmakers. Ask for an itemized quote that says which steps are included.
- 1
Inspect the watch and test timekeeping and water resistance.
- 2
Remove the movement from the case and take it apart.
- 3
Clean every part in a watch cleaning machine.
- 4
Inspect parts and replace worn ones, often including the mainspring on older watches.
- 5
Reassemble and oil the movement at the correct points.
- 6
Regulate the timekeeping across several positions.
- 7
Replace case gaskets and crown seals, then pressure test the case.
- 8
Optionally refinish the case and bracelet, if you ask for it.
Note.Refinishing removes a little metal each time. If you like the look of honest wear or own a vintage piece, ask for the case to be cleaned but not polished.
What affects the cost of a service
Service prices vary widely, so get a quote rather than relying on a typical figure. The main factors are the brand, since some makers' service centers charge more than independent watchmakers, and the movement, since a simple time and date caliber takes less work than a chronograph or GMT. Parts add to the bill when something is worn or broken.
For widely used movements such as the Seiko 4R36 or NH35, parts are easy to find and many independent watchmakers will work on them. For some Swiss brands, parts may only be supplied to authorized service centers. Check whether a watch under warranty must go back to the maker. Also compare the service quote with replacement cost; on some affordable watches, replacing the whole movement is a common, practical option a watchmaker may suggest.
Simple care between services
Our page on how to care for an automatic watch covers daily habits in more detail.
- Keep it away from strong magnets.
- Rinse it in fresh water after salt water or chlorine.
- Do not set the date during the hours when the date is changing, often roughly 9 pm to 3 am on many movements; check your manual.
- Screw down or push in the crown before water.
- Store it dry, in a box or on a watch winder if you want it running.
Frequently asked questions
How often should I service my Seiko automatic? Follow Seiko's guidance for your model. Many owners of 4R36 watches simply have them serviced when timekeeping or power reserve drops, and the movement is easy for watchmakers to work on.
Can I skip servicing if my watch runs fine? Many watches run for years past their suggested interval. The risk is that dried oils speed up wear on parts, which can make a later service more expensive.
How long does a watch service take? It varies by workshop and parts availability. Ask when you drop the watch off, and allow longer if it goes to a brand service center.
Does a service include water resistance testing? A full service usually includes new gaskets and a pressure test. Confirm it on the quote.
