So what do you get when you send a Credor for an overhaul/servicing with Seiko Japan?

As a follow-up to my post on my visit to Seiko Thailand, I finally received my Credor 4S79 fresh from an overhaul.

Credor 4S79 - Such a beauty!

Credor 4S79 – Such a beauty!

So other than a just serviced watch and a hefty bill, what do we get?

First up, I received the watch in a Seiko branded clear plastic bag. No fancy travel pouches or leather pouches unlike Swiss brands when you received your watch after a service.

Alongside the watch, I spied a Credor labelled envelope. Nothing fancy, just some normal office stationery.

Credor Envelope

Credor Envelope

Inside the envelope, we have the servicing report which genuinely is the highlight here.

True to their origins, we have a service report in Japanese and a corresponding one in English. Would be interesting to see if this was because the watch was sent in from outside Japan, because the English report was certainly printed on less fancy stationery! For instance, it’s not printed on a Credor labelled stationery, without any fancy red seal which is located at the top right hand corner of the Japanese report.

Credor Repair Report  Japanese

Credor Repair Report Japanese

Credor Repair Report English

Credor Repair Report English

The report states:


1) Case – Cleaned. Certainly looks cleaner than when I sent it in, without any sign of polishing. Hence no worries that your watches will lose their sharp edges/fancy finishing due to overzealous polishing during servicing.

2) Glass – Did not look scratched to me when I sent it in, but they “repaired” it.

3) Crown – passes examination.

4) Dial – Mint as the day it left the factory

5) Hand – Nothing that I would to change about them. They look amazing enough.

6) Caseback – Nothing replaced, nor polished.

7) Bezel – Fixed bezel, hence no replacement required.

8) Gasket – Changed each time Seiko opens a watch, as confirmed by Seiko Thailand. Part of the maintenance cost.


9) Band – Genuine Original Croc Leather Strap

10) Buckle – Original Pin Buckle, untouched and unpolished

They did not mentioned checking the spring bars. So no confirmation that they will replace worn out spring bars. Pity.


11) Second motion – I’m guessing they are either referring to the stop-second motion or the sweeping motion of a working seconds hand. Either way, it is working fine.

12) Accuracy – Now here is where I scratch my head. My watch is spec to +15/-10 sec a day, but it runs fast between +10 to +15 sec/8 hours, in all 6 positions at 1 temperature. This is based on my rudimentary manner of checking the watch versus internet time every 8 hours after a full wind, for all 6 positions.

This means that Seiko Japan did a good adjustment job, because it is now running consistently fast in all positions, but it runs fast. Probably need to be regulated slower. Do take note of the difference between regulation and adjustment.

13) Train wheel – 2nd, 3rd and 4th wheels work fine and cleaned.

14) Barrel & Oscillating unit – probably referring to the mainspring and 1st wheel. Cleaned.

15) Setting Part – I’m guessing its the keyless mechanism for setting the time. Cleaned.

16) Escapement – probably the escape wheel, pallet and balance wheel/spring. Demagnetized! Never underestimated the effects of leaving your watch on your laptop, which I do all the time. Will stop this practice.

17) Magnetization – Demagnetized.

Prominent things which I find lacking in the report are the timing results in different positions and temperatures and amplitude. However, these are also not necessarily found in the equivalent Swiss repair reports.


Dis-assembly of movement, cleaning, assembling, lubrication, inspection, adjustment and replacement of gasket.

Adjustment was indeed done based on my rudimentary observation mentioned above. I should probably get a timing machine to verify this.


It took me a total of 3 months (mid Mar – mid Jun) from the time I sent the watch to Seiko Thailand, air flown to Seiko Japan, assessed, get a quotation, repaired and then sent back to Seiko Thailand. All in, this is comparable to Swiss brands, who generally need a 6-10 weeks turnaround period for watches serviced in Singapore and more for those sent back to Switzerland (up to 6 months or more for more complicated pieces).

My freshly serviced Credor also comes with a 1 year warranty, which is what most Swiss brands will also offer.

Also, do note that even if I chose not to go ahead with the servicing after assessment, the watch will be flown back and returned to me at no extra cost. Most Swiss brands generally have a minimum cost to cover the delivery and assessment costs, should the customer decide not to go ahead with the servicing.

Overall, given that Credor is considered a higher end Seiko, their repair pricing and service is on par with most of the mid-high tier Swiss brands.



One thought on “So what do you get when you send a Credor for an overhaul/servicing with Seiko Japan?

  1. Pingback: Watch Performance :NOS vs Serviced | musingsofawatchaddict

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