An elegant Omega Seamaster 150m Co-Axial recently arrived at The Watchmaker workshop in Thessaloniki with a problem often encountered in mechanical watches: moisture ingress inside the case.

Although modern high-end watches are manufactured to high water resistance standards, the passage of time can affect the sealing materials. The gaskets, which protect the mechanism from water and moisture, harden over the years and lose their elasticity.

In this particular case, moisture had begun to affect the dial indicators, causing damage to their surface. At the same time, it was deemed necessary to perform a complete service of the mechanism to ensure the proper functioning of the watch.

Diagnosis and disassembly

The process began with the complete disassembly of the clock.

The bracelet was removed and the case was carefully opened so that the mechanism could be detached along with the dial. Then all the basic components of the case were disassembled:

• crown

• crystal

• lid

• sealing flanges

This process allows for complete control of each individual component of the watch.

Replacement of indicators after moisture damage

Moisture is one of the most significant enemies of a mechanical watch. When it penetrates the interior of the case, it can cause oxidation in metal components.

The indicators are particularly sensitive because:

• made of thin metal sheet

• often contain phosphorescent material

• are directly exposed to the interior environment of the box

In this particular Seamaster, the indices had been damaged by moisture and were therefore replaced with new genuine Omega indices, restoring the aesthetic harmony of the dial.

Complete service of the Co-Axial mechanism

Alongside the work on the dial, a complete service of the mechanism was also carried out.

The mechanism was removed from the watch and completely dismantled into its individual components. All components were cleaned in a special cleaning system to remove:

• old lubricants

• microparticles

• possible traces of moisture

After cleaning, the following steps were taken:

• detailed inspection of all components

• reassembly of the mechanism

• application of new high-precision lubricants

• adjustment of operation and accuracy

Omega's Co-Axial mechanisms are one of the most important technological developments in modern watchmaking. The escapement system significantly reduces friction and increases the stability of the mechanism's operation.

However, like any high-precision mechanism, it requires periodic maintenance to maintain its performance.

Replacement of flanges and restoration of watertightness

During servicing, all of the watch's gaskets were also completely replaced.

The gaskets are located at critical points of the frame:

• on the lid

• in the crystal

• on the crown

Replacing them is essential to maintain the 150-meter water resistance offered by this model.

Polishing of frame and bracelet

Alongside the technical work, careful polishing of the case and bracelet.

The aim is not to remove too much material, but to restore the original satin and polished surfaces designed by the manufacturer.

The correct polishing process preserves:

• the geometry of the frame

• the edges of surfaces

• the authentic aesthetics of the watch

Final assembly

After completing all the work, the clock was carefully reassembled.

The new hands were placed on the dial, the movement was returned to the case, and the watch was sealed with new gaskets.

The result is an Omega Seamaster 150m Co-Axial that functions flawlessly and has been restored to its original aesthetic condition.

Why regular servicing is important

This case is a good example of how important it is to have a mechanical watch serviced regularly.

Replacing seals in a timely manner can prevent problems such as:

• moisture ingress

• corrosion of components

• wear and tear of the mechanism

At The Watchmaker workshop in Thessaloniki, every watch is treated with respect and technical precision, so that it retains its reliability and aesthetics for many years to come.

FAQ — Questions about Omega service

How often should an Omega be serviced?

Usually every 5-7 years, depending on usage and operating conditions.

Can moisture destroy a mechanism?

Yes. Moisture can cause oxidation and serious damage to the metal components of the mechanism.

When should the sealing gaskets be replaced?

Gaskets must be replaced during each service or when a loss of tightness is detected.

The service was performed at The Watchmaker workshop in Thessaloniki, which specializes in the repair and maintenance of Swiss and German mechanical watches of high horology.