Category: Watch Case Studies

From our on-site workshop in Lewes, Sussex, we offer a full range of repairs including part jobs like battery changes and glass replacements through to full servicing of the vast majority of brands including Omega, TAG Heuer, Longines, Breitling and Rolex. Servicing your watch regularly is an important part of extending your watches life.

Disassembly and Diagnosis of the TAG Heuer Aquaracer Automatic Chronograph

In this instance, we are working on a TAG Heuer Aquaracer Automatic Chronograph with a blue dial. This watch is working but not keeping time and the date is not changing on arrival with us.

To find the source of the problem we need to disassemble the movement. This watch uses a TAG Heuer version of the ETA 7750 chronograph – a good quality, reliable chronograph movement used in many different versions by numerous quality watch brands. To find the source of the faults we need to disassemble the movement. During the course of this disassembly, it becomes apparent this watch hasn’t seen a watchmaker for some time as we note most oils and greases are completely dried up.

“A key to a successful repair is attention to detail. We carefully inspect each movement, ensuring that all components are properly cleaned, lubricated, and replaced as needed to restore full functionality.”

Repair Process and Parts Replacement

Inspection of the dial side of the movement reveals two faults – firstly, the finger of the date change wheel has completely broken off. This is a common fault when watch owners attempt to change the date on these chronographs when the date change wheel is already in position to click the date over. By attempting to manually correct the date when this wheel has moved into place, it can force the finger piece out of shape or, as in this instance, break it off completely. The simple advice to avoid this is to only correct the date on a 7750 family chronograph when the hands are in the bottom half of the dial.

We also find the driver cannon pinion is faulty. This is an important component, and it needs to fit with just the right amount of friction in order to allow the hands to be set and to still drive the hands during normal timekeeping.

Both the driver cannon pinion and date change wheel are replaced as part of the service. We also replaced a worn reversing wheel and changed the mainspring.

Testing and Final Inspection

As an authorised service centre for TAG Heuer, we are able to order the required parts to complete this repair direct from the manufacturer. We ordered the required movement parts, as well as a set of replacement seals. Only authorised workshops can order these parts from TAG Heuer.

To service and repair the movement, it is fully disassembled, checked and cleaned – going through a manual cleaning process before a cycle in our Elma Solvex RM automatic cleaning machine. Once parts are completely clean and dried, we can commence reassembly of the movement. During reassembly, we follow the manufacturer’s technical guidelines in terms of oil and grease usage, as well as the use of other treatments such as epilame.

“As an authorised TAG Heuer service centre, we are able to provide genuine parts and expert craftsmanship to ensure your watch is restored to its best condition.”

On top of the movement repairs, we give the case and bracelet a clean, alongside fitting replacement seals before we test the complete case – minus the movement – in both a wet pressure tester and a dry tester to confirm water resistance. We can now reunite all elements of the watch. With the movement refitted and everything checked on the time-grapher, we can close the case back before a final dry pressure test.

With the works completed we now test the watch using an Elma Cyclomotion watch winding machine, as well as testing in static positions and for the correct functioning of all features including the chronograph and quick date change. After the testing period is complete, this excellent TAG Heuer Aquaracer Chronograph can be reunited with its owner. Servicing a watch can take anywhere between a couple of weeks through to a number of months, learn more about how long it takes to service a watch here.

Summary

In this article, we walk through the repair process of a TAG Heuer Aquaracer Automatic Chronograph, showcasing the expertise and attention to detail required for servicing high-end timepieces. From diagnosing issues such as a broken date change wheel and faulty driver cannon pinion to the comprehensive servicing process, including part replacements and thorough testing, we highlight the precision and care involved. As an authorised TAG Heuer service centre, we ensure the use of genuine parts and follow manufacturer guidelines to restore the watch to its optimal condition, ultimately returning it to its owner fully functional and as good as new. If you have any questions about this process, use our ‘Ask A Watchmaker‘ function and we would be more than happy to help!

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Looking to Have Your Tag Heuer Aquaracer Serviced and Repaired?

At W.E. Watch Repairs, we specialise in servicing both modern and vintage timepieces, including TAG Heuer watches. As an official TAG Heuer Service Centre, we offer expert repairs, precision tuning, and full servicing, ensuring your watch receives the highest level of care. Our skilled watchmakers are here to help restore your timepiece to peak performance.

Take advantage of our Royal Mail Special Delivery FREEPOST service—your watch is fully insured for up to £20,000 throughout its journey, ensuring peace of mind from the moment it leaves your hands until it is safely returned.

Book your contemporary or vintage TAG Heuer watch for a service today and trust us to restore it to optimal condition!

Restoring a Vintage CWC Chronograph

Our fully equipped on-site watch workshop offers a full range of repairs – from smaller jobs like battery changes and glass replacements to full servicing of the vast majority of brands including Omega, Tag Heuer, Longines, Breitling, and Rolex, as well as vintage watch repairs. In this instance, we are working on what at first appears to be a military-issued CWC watch. CWC has a very interesting history supplying watches to MOD specifications for military personnel. However, this model was never actually issued – we can tell by the presence of the date display at 3 o’clock, demonstrating the version and authenticity of the vintage watch. Otherwise, it is almost identical to the non-date watches issued to RAF personnel.

“A watch’s history tells a story, but expert restoration ensures it continues ticking for generations to come.”

 

It’s a good quality mechanical watch, with the aforementioned date display and a 30-minute chronograph. The movement powering this vintage watch is the Valjoux 7765. These movements were manufactured between 1983-1998 and are very similar to the ubiquitous 7750 chronograph.

Repairing Water Damage and Replacing Components

On arrival with us, it was in very poor condition. There was significant water ingress, a missing pusher, and the chronograph seconds hands were completely bent and distorted. It needed a significant amount of work to get it back to excellent working order. Most old watches can be restored by expert watchmakers; learn more about our vintage watch repair service.

The water ingress had mostly affected parts involved in setting the hands and winding the watch – these include the ratchet wheel, crown wheel, clutch wheel, and winding pinion. These all needed to be replaced, along with various other components. It only takes a small amount of water damage to render a watch component unfit for purpose, so it is very important to avoid using a watch around water if it is not water-resistant. If you have a water-resistant model, you must avoid pressing pushers/adjusting the time when in water and ensure it is checked regularly to confirm it is still appropriately sealed.

“Even a small amount of water damage can render a watch component unfit for purpose—regular servicing is essential.”

Cleaning, Reassembly, and Final Testing

Once we have the movement fully disassembled and checked, the movement is cleaned – going through a manual cleaning process before a cycle in our Elma Solvex RM automatic cleaning machine. Once parts are completely clean and dried, we can commence reassembly of the movement. During reassembly, we followed our typical servicing procedure using the manufacturer’s technical guidelines in terms of oil and grease usage, as well as the use of other treatments such as epilame.

Alongside the work to the movement, we need to replace the missing pusher. We are able to source an original CWC pusher for this model, and this is fitted using a Horia 2015 tool – a very adaptable piece of kit, perfect for jobs like fitting pushers and tubes. The case is given a thorough ultrasonic clean before we can reunite all elements of the watch.

“Every serviced watch undergoes rigorous testing to guarantee accuracy, power reserve, and flawless chronograph functionality.”

 

With all works completed, we now test this excellent CWC chronograph to ensure good timekeeping within tolerance, appropriate power reserve, and the correct functioning of the chronograph. Once testing is complete, it is released ready for collection by our client. If you’re interested in the process of restoring vintage watches, or you have any questions about servicing your watch, contact us using our Ask the Watchmaker form.

Expert Vintage Watch Restoration at W.E. Clark & Son

At W.E. Clark & Son, our specialist watchmakers provide expert servicing, precision restoration and refurbishment for vintage watches and luxury timepieces. Recently, we fully restored a vintage CWC chronograph suffering from water damage, missing components, and mechanical wear. Using original parts and industry-leading techniques, we carefully repaired the movement, replaced worn elements, and conducted thorough testing to ensure accuracy and longevity.

If your timepiece needs servicing or restoration, contact us today or visit us in store to discuss how our expert team can bring your watch back to its best.

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Need Your Vintage Watch Serviced or Repaired?

Take advantage of our Royal Mail Special Delivery FREEPOST service for a secure and hassle-free experience. Your watch is fully insured for up to £20,000 throughout its entire journey, from the moment it leaves your hands until it’s safely returned to you. Trust our expert watchmakers to restore your timepiece with precision and care.

Book your vintage watch service today!

From our fully equipped watch workshop In Lewes we offer a full range of repairs – from smaller jobs like battery changes and glass replacements through to full watch servicing of a wide range of brands including Omega, Tag Heuer, Longines, Breitling and Rolex. 

Disassembly and Servicing of the Omega Speedmaster Movement

For this job, we are working on an Omega Speedmaster, similar to the Omega Speedmaster Triple Calendar Chronograph that we serviced a while back. We often see Speedmasters in the workshop – a testament to the enduring popularity of these watches. This model is an automatic chronograph with date. The three sub-dials indicate seconds, plus chronograph minutes and hours. The centre second hand is for the chronograph seconds.

“The Omega Speedmaster is a testament to enduring craftsmanship and reliability, with many owners trusting its chronograph functionality year after year. Despite wear over time, the movement remains a classic in the world of automatic chronographs.”

 

It arrived in well-worn condition and had not been to a watchmaker in many years, so this means worn-out parts are highly likely, especially those involved in the automatic winding mechanism. Despite the lack of previous maintenance, our British Horological Institute-qualified watchmaker brings extensive experience in repairing vintage watches.

First, we disassemble the movement. This Omega Speedmaster uses an Omega calibre 1164, which is an Omega customised version of the ETA calibre 7750. These are good, solid chronograph movements and the 7750, in different variations, has been used in quality automatic chronograph watches for many decades.

As anticipated, wear is found in the automatic mechanism – both the rotor bearing and the reversing wheel need replacing. Most oils and greases are dried up, though everything else appears in good order besides the mainspring which we replace as standard.

Once fully disassembled the movement is cleaned – first going through a manual cleaning process before a cycle in our Elma Solvex RM automatic cleaning machine. When parts are completely clean and dried, we can commence reassembly. We follow the manufacturer’s technical guidelines for the correct usage and placement of oil and grease, as well as the use of other treatments such as epilame. 

As part of the service we fit the replacement parts – a new mainspring, reversing wheel and rotor bearing. We always endeavour to fit a new mainspring as part of a service, though it’s especially important when dealing with a watch like this. The mainspring is housed inside a barrel which is buried in the very depths of the movement underneath all of the chronograph mechanism, so replacing it is not straightforward without the watch being fully stripped down.

“Replacing the mainspring is not a simple task—its position deep within the movement, under all the chronograph mechanisms, requires careful disassembly. This meticulous attention to detail is essential to ensuring the Speedmaster continues to perform at its best.”

 

Alongside the movement servicing we give the case and bracelet a light polish, clean and fit replacement seals as appropriate before conducting a pressure test to confirm water resistance. We can now reunite all elements of the watch. With the movement refitted and everything checked on the timing machine, we can close the case back before a final pressure test. 

Final Testing and Reassembly: Restoring the Omega Speedmaster to Perfection

With the works completed we now test the watch using an Elma Cyclomotion watch winding machine, as well as testing in static positions and for the correct functioning of all features including the chronograph and quick change of the date. After the testing period is complete this superb Omega Speedmaster Chronograph can be reunited with our client. If you’re interested in the turnaround time for watch servicing, have a look at our article  “How Long Does A Full Watch Service Take” to learn more about the factors that can affect the timeline and how we ensure a thorough, efficient process for every watch we service.

Summary

At W.E. Watch Repairs in Lewes, we provide comprehensive watch servicing, from basic repairs to full movement overhauls. In this case, we serviced an Omega Speedmaster, addressing wear in the automatic winding mechanism and replacing critical components like the rotor bearing and mainspring. The movement was carefully cleaned, reassembled, and tested to ensure optimal performance. Our team follows precise technical guidelines to restore watches to their original functionality.

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Looking to Have Your Omega Speedmaster Serviced?

At W.E. Watch Repairs, we specialise in servicing both modern and vintage timepieces. Whether your Omega Speedmaster needs a full service, precision tuning, or expert repairs, our skilled watchmakers are here to help.

Take advantage of our Royal Mail Special Delivery FREEPOST service—your watch is fully insured for up to £20,000 throughout its journey, ensuring peace of mind from the moment it leaves your hands until it is safely returned.

Book your vintage watch for a service today and trust us to restore it to peak performance!

The Omega Constellation is an iconic luxury timepiece. It’s a very popular watch, so, unsurprisingly, we see many of these in our workshop, as well as many Omega Speedmaster watches. Launched in 1952, it became one of Omega’s flagship collections, recognised for its distinctive pie-pan style dials, which later evolved into a range of other dial designs. The Constellation is best known for the “claws”, found at 3 and 9 o’clock, a feature introduced in the 1980s and found in both stainless steel and gold depending on the exact model.

Evaluating the Omega Constellation’s Wear and Performance

On arrival, our client’s watch was working, though the timekeeping was poor. There was plenty of general wear including scuffs and scratches all over the case and bracelet.

Inspection of the movement revealed the usual dried oils and greases, as is common when a watch requires a service. This Omega Constellation is powered by the Omega calibre 1120 movement – an automatic mechanical watch movement of excellent quality. This is a modified version of the ETA 2892A2 – a movement produced by ETA, one of the top watch movement manufacturers. The modifications are designed to improve performance, with 23 jewels and a three-arm Glucydur balance amongst the modifications made to the base movement.

“Precision is at the heart of every Omega timepiece. Our expert repairs restore both function and beauty, returning your watch to its original brilliance.”

 

Signs of Previous Repairs and Component Wear

This particular movement has clearly needed watch repair in its history, as we can see signs of previous disassembly, notably where the incorrect screwdriver size has been used, so the edge of the screwdriver ends up touching and marking the plate. This does not cause a functional issue, but nevertheless, it is undesirable and should obviously be avoided. We also note the train wheel bridge has been replaced at some point, and the reversing wheel is almost completely worn through.

Servicing and Restoring the Movement and Case

To repair the watch it is fully disassembled and each part inspected, with defective components replaced. The disassembled movement is run through our specialist watch movement cleaning machine, while the case and bracelet are cleaned in a separate ultrasonic cleaner. After cleaning, the movement is carefully reassembled and oiled with the replacement parts fitted.

Once cased up we fine-tune the timekeeping to make sure the watch is as accurate as it can be. As this model is chronometer rated it is very accurate – when new it went through a series of strict tests to ensure excellent timekeeping accuracy. We always endeavour to get timekeeping as accurate as we can and various factors can affect this, including the calibre of the movement, age and condition of the watch.

All that’s left is to thoroughly test this excellent Omega Constellation watch before it is ready to return to our client.

Summary

At W.E. Clark Watch Repairs, we specialise in restoring luxury timepieces like the iconic Omega Constellation. This particular model, powered by the high-quality Omega calibre 1120 movement, arrived in our workshop with poor timekeeping, visible wear, and signs of previous repairs. Our meticulous process involved a full disassembly, deep cleaning using specialist equipment, and the replacement of worn components. Once reassembled, we fine-tuned the movement to ensure exceptional accuracy. As trusted experts in horology, we take pride in delivering precision restoration, maintaining the integrity and performance of every watch we service.

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Looking to Have Your Omega Constellation Serviced?

At W.E. Clark Watch Repairs, we specialise in restoring modern and vintage timepieces. Whether your Omega watch needs servicing, precision tuning, or expert repairs, our master watchmakers are here to help.

Take advantage of our Royal Mail Special Delivery FREEPOST service—your watch is fully insured for up to £20,000 throughout its entire journey, from the moment it leaves your hands to when it is safely returned.

Book your Omega watch in today and experience expert care you can trust!