Certina Serial Numbers

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It has two rows of numbers on the back: 747 along with a text that says 'Waterproof'. The logo is the 'two c's' Certina logo along with 'Automatic', and it has arrowhead numbers apart from 12, 3, 6 and 9 which are a sort of bars or roman numerals, double for 3, 6 and 9 and triple for 12. Scan the QR code, Follow us on WeChat, and experience CERTINA World!

Why does a watch need servicing?

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As with all precision instruments, a watch should be regularly serviced by an officially certified customer service centre so that it continues to function perfectly – as one would do with a car. After all, each second that your watch ticks is a moment of precision and performance. The frequency with which a watch should be serviced depends on the model, climatic conditions and the habits of the wearer. As a rule, a general service is recommended every three to four years.

Servicing Rates

This Certina servicing price list gives you an idea of approximate servicing costs: these are the prices in use in the official Certina service centres of the Swatch Group AG. Our independent Certina partners are not bound by these price recommendations and may adjust them as they see fit.

To have your watch repaired or serviced, please contact an official Certina service centre or an authorized Certina dealer.

FAQs / Queries

Do you have a question for Certina? Here you will find our answers to the most frequently asked questions we receive. If you don't find the answer you are looking for, please send us your query using the contact form.

Customer Service Commitment

As a renowned watch brand, Certina's reputation was built on a long tradition and the highest standards of quality. For this reason, Certina only uses the finest components and materials. Our objective is to improve the already high level of customer service, on a worldwide scale. Customers can expect a complete, efficient service characterised by a high degree of quality and innovation. As such, customer service is a vital component of Certina's international marketing strategy, and major ongoing investment is made to ensure continuous development in this area. Complete customer satisfaction is key for Certina. Therefore, all watches are guaranteed for 24 months from the date of purchase, in accordance with the general terms and conditions of our written warranty.

Certina accepts no responsibility whatsoever for any watch or other product bearing the Certina name, trademark, logo or symbol, which was not purchased from an authorised dealer.

Certina's global customer service representatives have been carefully selected, trained and accredited. They are committed to ensuring that customers around the globe benefit from excellent customer service. Certina aims not only to fulfil, but rather to surpass the expectations of its customers and therefore, should Certina's customer service department be unable to fulfil these expectations, Certina HQ can be contacted directly.

Service: Certina Club 2000 With 25-66M Movement

Certina Serial Numbers Us

This is a wonderful vintage Certina Club 2000.

Although it’s one of the lower grade Certinas, it’s still beautifully finished and it has a solid stainless steel case.

All the Certina in-house movements that I’ve encountered are great performers and you can accurately regulate them with the micro-regulator.

Sadly, the 25-66Mmovement in this Certina wasn’t running.

Certina produced the 25-66M from ’75 till ’77. This Certina has a serial number that consists of 9 digits and that indicates that it’s a ’74+ piece so it’s all adding up.

There were some problems with winding because you could wind it forever without it ever building up any resistance. If you think that sounds like a broken mainspring, you’re right!

It also had some problems with water resistance because at one time the crystal fogged up during an exceptionally hot day.

Disassembly

Before you start working on a mechanical movement, make sure to remove all the power from the mainspring. This way, you’ll minimize the risk of damage when working on the wheel train later.

Move the click away from the ratchet wheel and let the crown slip between your thumb and index finger.

Lift the balance and the pallets.

Certina Serial Numbers

Turn the movement around and lift the cannon pinion. The cannon pinion is installed on the center wheel post so you won’t be able to lift the center wheel later if you don’t remove it.

As you can see, this movement is a bit different.

The crown wheel is located within the wheel-train bridge instead of the barrel bridge. The ratchet wheel overlaps the wheel-train bridge as well so you’ll need to lift the crown wheel and the ratchet wheel before you move on.

Lift the wheel-train bridge to expose the wheel train.

Remove the escape wheel, 4th wheel, and the sweep second wheel.

Take out the barrel bridge and lift the main barrel.

As suspected the mainspring was broken, so I had to find a new one. This was a bit of a challenge because the exact dimensions that Bestfit and the GR folder mentioned, were obsolete at the warehouses.

Luckily, a friend had one in his stash of parts so he sent it to me.

Lift the center wheel cock and remove the center wheel.

Certina Serial Numbers

Flip the movement around and begin with the bottom plate.

Pre-clean the pivot holes and bearing jewels with a peg wood.

Clean all the parts in the watch cleaning machine.

Certina Serial Numbers

Assembly

Start with the center wheel, the center wheel cock, and the main barrel.

Lubricate the post of the center wheel before you assemble it and lubricate the arbor on both sides of the main barrel as well (both with Moebius HP1300/D5).

Reinstall the barrel bridge.

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Place the escape wheel, 3rd wheel and the sweep second wheel and refit the wheel-train bridge.

Install the ratchet wheel and the crown wheel.

Don’t forget to lubricate the crown wheel shim with a tiny bit of Moebius HP 1300/D5.

Turn the movement around and start with the motion works and the keyless works.

Lubricate the posts for the setting wheel, the return bar, and the cannon pinion with Moebius 9501.

Don’t forget to lubricate the finger of the set lever spring that is in contact with the set lever.

Flip the movement to the top plate and start with the pallets.

Lubricate the exit stone of the pallets with Moebius 9415.

Replace the balance and enjoy watching the movement come alive.

Take out the Incabloc jewel holes and jewels on both sides and clean and lubricate them (Moebius 9010).

After I cased the movement, I fitted a new crystal (with a tension ring).

I also fitted a new case back gasket which I lubricated with a lubricating sealing grease to increase/restore the water resistance.

Serial

Finally, I treated the inside of the crown with KT-22 grease. It makes the crown wind smoothly but more importantly, it protects against moisture and rust and creates a waterproof seal.

During test running the mainspring broke again! I guess it must have gotten bad somehow during storage.

I had to order a new one but the exact dimensions still weren’t available.

In the end, I ordered a mainspring that was 0.005 mm thinner – 0.115 instead of 0.12.

New Orient Watch Serial Decode/Real Or Fake

0.005 is mm is only slightly different and the newer mainsprings are a bit stronger than the older ones so that shouldn’t be a problem.

The amplitude of 328 degrees is proof of that.

What do you think of this Certina? Do you have a similar watch? Let me know in the comments below.

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