A mechanical watch is designed to be maintained, repaired and enjoyed for generations.

Your Trey Stone watch is powered by a Swiss-made Sellita SW200-1 automatic movement. It does not use a battery. Instead, the natural motion of your wrist winds the movement while you wear the watch.

Although an automatic watch winds itself, it is not maintenance-free. The movement contains many small mechanical components that operate whenever the watch is running. Over time, its lubricants, seals and moving parts require professional inspection and service.

With thoughtful everyday care and periodic maintenance by a qualified watchmaker, your Trey Stone watch can remain a reliable companion for decades and will one day be passed to the next generation.

How the Movement Is Powered

Inside the watch is a weighted rotor that moves as your wrist moves. This motion winds the mainspring, which stores the energy needed to operate the watch.

When fully wound, the Sellita SW200-1 movement provides approximately 38 to 41 hours of power reserve. If the watch is not worn or wound during that period, it will stop. This is normal and does not indicate a problem.

Wearing the watch regularly will generally provide enough motion to keep it running. However, normal activity levels vary, and occasional manual winding may be necessary.

The Crown

The crown is the small knob on the side of the watch used to wind it and set the time.

Operate the crown gently at all times. Do not pull it outward abruptly or use excessive force when moving it between positions. When winding the watch, turn the crown slowly and stop if you feel increased resistance; there is no need to continue winding once the watch is running. After setting or winding the watch, press the crown back into place and screw it down gently until it is properly secured. Do not overtighten it.

Restarting a Stopped Watch

When the watch has stopped:

1. Gently unscrew the crown.
2. Turn the crown clockwise approximately 10 to 20 times.
3. Pull out the crown and set the correct time.
4. Press the crown inward and screw it down gently until secure.

A watch winder is not required. It is safe to allow the watch to stop when it is not being worn and restart it when you are ready to wear it again.

Keep the Crown Secure

The screw-down crown is an important part of the watch’s water-resistant construction. Always make sure the crown is fully screwed down before wearing the watch in or around water. Never unscrew, wind or operate the crown while the watch is wet or submerged.

Protect the Watch from Strong Impacts

Your watch is designed for normal everyday wear, but a mechanical movement contains very small and precise components operating within narrow tolerances.

Strong impacts or repeated vibration may affect the movement, crown, crystal or water-resistant seals.

Remove the watch before activities involving:

• Contact sports
• Heavy impacts
• Repeated use of high-vibration tools
• A significant risk of striking the watch against a hard surface

Have the watch inspected after a severe impact, particularly if its accuracy, crown operation or water resistance appears to have changed.

Avoid Strong Magnetic Fields

Strong magnetic fields may affect the accuracy of a mechanical watch and cause it to gain time, lose time or stop.

Avoid leaving the watch directly against powerful speakers, magnetic clasps, large electrical motors or strong magnetic sources.

Magnetism usually does not cause permanent damage. A trained watchmaker can test and demagnetize the movement when necessary.

Avoid Extreme Temperatures

Avoid prolonged exposure to extreme heat, extreme cold or sudden temperature changes.

Do not leave the watch for extended periods:

• On a vehicle dashboard
• Inside a closed vehicle in direct sunlight
• In a sauna or steam room
• On an unusually hot or cold surface

Extreme temperatures can affect timekeeping, movement lubricants, seals and leather straps.

Avoid Chemicals

Fuel, solvents, cleaners, perfume and colonge, insect repellents, sunscreen and other chemicals may damage the watch’s seals, exterior finishes or leather strap.

Apply fragrances, cosmetics and sunscreen before putting on the watch whenever practical.

Case and Crystal

Wipe the case and crystal periodically with a clean, soft microfiber cloth to remove fingerprints, perspiration and surface residue.

Do not use abrasive cleaners, metal polishes, solvents or household cleaning products to clean the watch.

Metal Bracelet

When the crown is fully secured and the watch’s water resistance has been properly maintained, the case and metal bracelet may be cleaned using fresh lukewarm water and a soft brush.

After exposure to salt water or chlorinated water:

1. Rinse the watch with fresh water.
2. Dry it thoroughly with a soft cloth.
3. Make sure no moisture remains between the bracelet links.

Do not place the complete watch in an ultrasonic cleaner. Ultrasonic cleaning of a bracelet should only be performed after the bracelet has been removed from the watch.

Leather Straps

Leather is a natural material that will gradually develop character through use.

To extend the life of the strap:

• Avoid soaking it in water
• Keep it away from perfumes, oils and chemicals
• Allow it to dry naturally if it becomes damp
• Do not dry it using direct heat or intense sunlight
• Rotate between straps when practical
• Wipe the lining gently after heavy perspiration

Replace the strap when it becomes cracked, excessively stretched or damaged near the spring bars, buckle or adjustment holes.

Water Resistance Is Not Permanent

Your Trey Stone watch is constructed and tested for water resistance. However, water resistance can decrease over time.

The case relies on gaskets and seals that may age, dry out or become damaged through normal use, temperature changes, chemicals or impacts. Opening the case may also affect water resistance if the seals are not properly inspected, replaced and tested.

When to Test Water Resistance

We recommend having the watch pressure tested:

• Once each year if it is regularly used while swimming or frequently exposed to water.
• Whenever the case has been opened.
• After a significant impact to the watch or crown.
• If the crown, crystal or case has been damaged.
• Before returning an older watch to regular water use.
• Whenever there is uncertainty about the condition of the seals.

Testing should be completed by a professionally trained watchmaker or watch repair facility with appropriate pressure-testing equipment.

Moisture Beneath the Crystal

Condensation, fogging or visible moisture beneath the crystal may indicate that water has entered the watch.

If moisture appears:

1. Do not continue using the watch.
2. Do not operate the crown.
3. Do not attempt to dry the watch with a hair dryer, oven or other heat source.
4. Arrange for professional inspection as soon as possible.

Prompt attention may reduce damage to the movement, dial and hands.

Why an Automatic Watch Requires Service

An automatic movement contains wheels, pivots, springs, bearings and other components that operate whenever the watch is running.

Special lubricants reduce friction between these parts. Over time, the lubricants may deteriorate, migrate or dry out. This can increase friction and gradually cause wear.

A mechanical watch may continue to run even when its lubricants are no longer providing ideal protection. Periodic maintenance is therefore preferable to waiting until the watch stops or develops a serious problem.

Recommended Service Interval

As a general guideline, have your Trey Stone watch professionally evaluated approximately every five years.

The appropriate service interval may vary based on:

• How frequently the watch is worn.
• The environments in which it is used.
• Exposure to water, dust, impacts or temperature extremes.
• Changes in accuracy or power reserve.

An evaluation does not always mean that a complete service will be required. Depending on the condition of the watch, the watchmaker may recommend:

• A complete movement service
• A timing adjustment or regulation
• Replacement of seals and pressure testing
• Repair of a specific component
• Continued use with no immediate work required

Use a Qualified Professional

Mechanical watch service should only be performed by a licensed watch repair professional where licensing applies, or by a professionally trained and qualified watchmaker.

Do not allow an untrained person to open, adjust or repair the watch. Improper service may damage the movement, compromise its water resistance or result in incorrectly fitted replacement components.

After the warranty period has expired, routine service and repairs may be completed by a qualified independent watchmaker or established watch repair facility.

Selecting a Service Provider

Choose a watchmaker who:

• Regularly services Swiss mechanical and automatic movements.
• Has experience with the Sellita SW200 movement family or comparable movements.
• Has recognized professional training, certification or substantial watchmaking experience.
• Uses the proper tools, lubricants and technical procedures.
• Can measure and regulate the movement in multiple positions.
• Can test power reserve and movement performance.
• Has appropriate water-resistance and pressure-testing equipment.
• Provides a written estimate before beginning work.
• Provides a written warranty for the completed service.
• Documents the work performed.

In the United States, professional watchmaking certification through organizations such as the American Watchmakers-Clockmakers Institute may provide useful evidence of training. Other countries may have different certification or licensing systems.

The Sellita SW200-1 is a widely serviceable Swiss movement. Normal post-warranty maintenance does not require the watch to be returned to Trey Stone or Switzerland.

Have the watch inspected by a qualified watchmaker if you notice:

• A sudden or persistent change in accuracy.
• A meaningful reduction in power reserve.
• The watch stopping unexpectedly while being regularly worn.
• Unusual resistance while winding or setting the time.
• Difficulty operating or securing the crown.
• Unusual movement or rotor noise.
• Condensation or moisture beneath the crystal.
• Damage following a significant impact.
• A loose crown, crystal or case component.

Small daily variations in timekeeping are normal for a mechanical watch. A substantial or continuing change is a better indication that regulation, inspection or service may be needed.

Movement Inspection and Maintenance

A complete mechanical service is more than a simple timing adjustment.

The exact work will depend on the condition of the watch, but a properly performed service will generally include:

• Initial inspection and diagnosis.
• Testing of accuracy, amplitude and function.
• Removal of the movement from the case.
• Complete disassembly of the movement.
• Cleaning of the movement components.
• Inspection for worn or damaged parts.
• Replacement of worn components when required.
• Application of the correct lubricants.
• Reassembly of the movement.
• Regulation and timing adjustment.

Case and Water-Resistance Inspection

The service should also include inspection of the exterior components that protect the movement, including:

• Crown
• Crown tube
• Crystal
• Case
• Caseback
• Gaskets and seals

Seals should be replaced when appropriate, followed by pressure and water-resistance testing.

Final Testing

After the watch has been reassembled, the service provider should test:

• Accuracy
• Winding function
• Time-setting function
• Power reserve
• Automatic winding performance
• Water resistance
• Overall operation

Keep service invoices, pressure-test results, timing reports and repair records with the watch’s original documents.

A documented service history helps future watchmakers understand how the watch has been maintained. It also gives future owners a record of its care and supports the watch’s long-term value and integrity.

A mechanical watch is made to be worn, maintained and carried forward.

With sensible everyday care and periodic service by a professionally trained watchmaker, your Trey Stone watch can continue measuring life’s moments for many years—and for several generations.