Here the revision of a probably 1920s Art déco pocket watch.
![](https://blog.noq2.net/content/images/IMG_9493.jpg)
The flat Savonette design (the watch opens when you push a button integrated in the crown) and the blued hands with their needle-like tip make it quite timeless and elegant.
![](https://blog.noq2.net/content/images/IMG_9496.jpg)
The outer caseback says it has a 20 micron double layer gold coating on it and a 10 years warranty - not too bad.
![](https://blog.noq2.net/content/images/IMG_9497.jpg)
Fine scratches on the inner caseback - they are not that well-visible under normal lighting circumstances...
![](https://blog.noq2.net/content/images/IMG_9498.jpg)
The watch is a non-worker with many faults.
![](https://blog.noq2.net/content/images/IMG_9499.jpg)
The most serious one is the two broken upper balance jewels. Maybe the watch was knocked or fell down once. The balance pivots are - surprisingly - okay.
![](https://blog.noq2.net/content/images/IMG_9500.jpg)
The second hand wheel jewel is damaged, too.
![](https://blog.noq2.net/content/images/IMG_9667.jpg)
The cap jewel of the balance wheel in detail.
![](https://blog.noq2.net/content/images/pwatch_blued1.jpg)
And a (dof-stacked) image of the jewel bearing in the balance cock (as seen from below).
Repairing the pocket watch
I started with replacing the balance cock jewels - the result can be seen in the next picture.
![](https://blog.noq2.net/content/images/IMG_9668.jpg)
Now that the balance was working again, I could check for the amplitude of the movement.
![](https://blog.noq2.net/content/images/IMG_9702.jpg)
The low amplitude and timegrapher pattern indicate the necessity of a complete overhaul of the movement.
![](https://blog.noq2.net/content/images/IMG_9706.jpg)
The movement removed from the case.
![](https://blog.noq2.net/content/images/IMG_9709.jpg)
Under the dial.
![](https://blog.noq2.net/content/images/IMG_9710.jpg)
The mechanics of the keyless works.
![](https://blog.noq2.net/content/images/IMG_9711.jpg)
The engravings show a swiss cross and numbers 51488 (I did not find more info on the exact producer however...any hint appreciated, feel free to comment =-).
![](https://blog.noq2.net/content/images/IMG_9713.jpg)
There is a lot of old grease under the crown wheel.
![](https://blog.noq2.net/content/images/IMG_9714.jpg)
The balance removed once again.
![](https://blog.noq2.net/content/images/IMG_9715.jpg)
A view on the wheel train.
![](https://blog.noq2.net/content/images/IMG_9717.jpg)
Baseplate and the removed center wheel with cannon pinion.
![](https://blog.noq2.net/content/images/IMG_9718.jpg)
Old oil in the mainspring barrel.
![](https://blog.noq2.net/content/images/IMG_9721.jpg)
The movement parts before cleaning...
![](https://blog.noq2.net/content/images/IMG_9722.jpg)
...and clean and sorted before reassembly.
![](https://blog.noq2.net/content/images/IMG_9724.jpg)
I also removed corrosion from the hands and I gave them a new polish.
![](https://blog.noq2.net/content/images/IMG_9725.jpg)
The mainspring gets new oil.
![](https://blog.noq2.net/content/images/IMG_9727.jpg)
The reassembled movement.
![](https://blog.noq2.net/content/images/IMG_9728.jpg)
The timegrapher shows almost a line - quite okay. The low amplitude (between 200 and 300 would be much better) suggests to replace the worn-out mainspring with a new one. However, I omitted that due to too high costs.
![](https://blog.noq2.net/content/images/IMG_9730.jpg)
Here a final view on the cleaned movement...
![](https://blog.noq2.net/content/images/IMG_9729.jpg)
...and on the dial.
greetings noq2
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