How to properly maintain your automatic watch (Seiko Mod): complete guide

Between mechanical precision and timeless style, the automatic watch occupies a special place on its owner's wrist. Whether it's an original Seiko or a Seiko Mod (custom modification), this watch requires careful maintenance to maintain its performance and aesthetics over the long term. In this comprehensive article, we explain how to properly maintain your automatic watch , including Seiko Mods , which are very popular with enthusiasts.

Why is automatic watch maintenance essential?

Unlike quartz watches, automatic watches operate using a complex mechanical movement powered by wrist movements. This mechanism, composed of dozens or even hundreds of moving parts, requires regular attention to prevent premature wear.

The benefits of good maintenance:

• Extend the life of your watch
• Maintaining the precision of the automatic movement
• Maintain the watch's water resistance and appearance
• Enhance your long-term investment

As Objectif Horlogerie reminds us, good maintenance helps avoid costly or irreparable repairs.

How often should I service an automatic watch (Seiko Mod)?

The frequency of maintenance depends on how you use your watch:

Type of use	Recommended revision frequency
Intensive daily life	Every 12 to 18 months
Moderate daily	Every 2 to 3 years
One-off / collection	Every 4 to 5 years

A Seiko Mod, often based on NH35 or NH36 movements, deserves the same rigor as an original model.

Exterior cleaning: how to preserve the case, glass and bracelet?

1. The case and the glass

Use a soft, dry microfiber cloth to wipe away dust and fingerprints daily. For a deeper clean:

• Prepare a mixture of warm water and mild soap
• Lightly soak the cloth (never the entire watch)
• Wipe the case and glass gently
• Dry with a clean cloth

Absolutely avoid : chemicals, alcohol or abrasive sponges.

2. The bracelet

• Steel bracelet : soft toothbrush + soapy water
• Leather strap : specific leather cleaner, without excessive moisture
• Silicone or rubber bracelet : clear water and neutral soap

For more specific advice, see this Watch Brand guide.

Waterproofing: the great forgotten

The water resistance of an automatic watch is not permanent . It is ensured by gaskets which deteriorate over time. It is recommended to:

• Have the watertightness tested every year if you swim with it
• Avoid pulling out the crown or pressing buttons underwater
• Never expose a non-waterproof watch to moisture

Shocks, magnets, temperature: the invisible enemies

Automatic watches are sensitive to environmental factors that are often ignored:

• Severe shocks : Even with a robust movement like the NH35, a fall can throw the balance wheel out of alignment or break a part.
• Magnetic fields : electronic devices, speakers, magnetic bag closures may affect accuracy.
• Extreme temperatures : Avoid leaving your watch in direct sunlight or in a car in winter.

Manual winding: useful or not?

Although the automatic movement winds itself naturally with wrist movements, occasional manual winding is recommended:

• 15 to 20 turns of the crown after a prolonged period of inactivity
• Always clockwise
• Never force: resistance indicates that the spring is full

Please note : some Seiko Mods (NH35, NH36) have manual winding AND stop-seconds to facilitate precise adjustment.

Storage: keep your watch off your wrist

• Always store the watch in a dry place at room temperature
• Use a hard case or watch box (ideally velvet lined)
• If you own multiple watches, an automatic watch winder can be useful to keep the movement running.

Revisions and lubrication: an essential technical step

Like a car, an automatic watch requires regular thorough servicing. This includes:

• Complete disassembly of the movement
• Ultrasonic cleaning
• Lubrication of components
• Checking for leaks
• Precision control (chronocomparator)

These operations should be entrusted to a professional watchmaker. Seiko recommends a service every 3 to 5 years on its standard models ( Seiko FAQ ). For a heavily used Seiko Mod, a frequency of 18 to 24 months is preferable.

Tips to extend the life of your Seiko Mod

• Take off your watch to sleep, especially if the strap is leather
• Avoid contact sports with your watch on your wrist
• Regularly inspect the condition of the bracelet and case back
• Do not wear your watch in the shower, even if it is waterproof.

FAQ: Frequently asked questions about maintaining automatic watches

How long does an automatic watch last?

With proper care, an automatic watch can last for decades. Some vintage Seiko watches are still running perfectly after 40 years.

Can you open an automatic watch yourself?

This is strongly discouraged without the proper tools. You risk compromising the water resistance and damaging the movement. Please contact our customer service and request a watch service.

Why does my automatic watch stop?

Lack of wrist movement is the most common cause. Wear it for several hours or manually wind it to restart the automatic movement.

Can tap water damage my watch?

Yes, if it leaks. Even waterproof models should be checked regularly. Never submerge a watch that is not guaranteed waterproof, and be very careful to ensure that the crown is screwed tightly against the case.

What is the difference between Seiko and Seiko Mod?

A Seiko Mod is a customization of a base Seiko model, often assembled by enthusiasts or watchmakers from compatible spare parts.

Conclusion

Maintaining an automatic watch, and even more so a Seiko Mod, is a subtle art that combines rigor and attention. By following these tips, you'll extend the life of your timepiece while getting the most out of its precision and aesthetics.

To discover carefully assembled Seiko Mod models, visit our online custom watch store