time

Comtoise radio clock

Unfortunately, few Comtoise clocks are completely preserved and often you can only find individual parts.
That’s why I bought two Comtoise clock-face with matching plates in January 2019.

So the idea was obvious to build a new Comtoise clock from scratch. My radio clock upcycling had the goal of adapting it to the 21st century in addition to functionality.

Comtoise condition when purchased

I was able to acquire this Comtoise clock-face with shield from a private seller who could call two of these pieces of jewelry his own. On the right of the picture you can see one of them: The beautiful sun symbol distinguishes it! As can be seen relatively well, time has left its mark on the brass. So my first goal was to restore a nice shine.

I tried different options: Various lyes as well as polishes and a lot more. In my opinion, the highly specialized lyes in particular achieved the least desired effect. I actually got the best result with an ordinary metal cleaner that you can buy in various drug stores. When using chrome cleaner, please note that it should have a good liquid consistency. I advise against using a standard car cleaner, as you should definitely not scratch the brass.

Comtoise Funk Upcycling - cleaning the brass plate

Here you can see quite well how a wrong remedy works. Instead of just having to start from scratch, I also had to remove the dirt from the cleaning agent.


Intermediate result: The brass is visible again

Comtoise radio clock upcycling - polishing the brass plate
Polishing the brass shield
Comtoise radio clock upcycling - intermediate polishing status
Intermediate status during polishing

After the brass plate was polished to a shine, I was able to start the Comtoise upcycling to the radio clock.

After hours of polishing, I was able to put the clock-face in!

Comtoise radio clock upcycling, first fitting

Now this construction is by no means stable enough to hang on the wall. What the watch needs now is a frame.

Some waste wood is brought to life.

Thanks to our lessor, Carius Druck, I received some wooden strips from the cellar that would otherwise have ended up in the bulky waste. What I would not have thought: It was actually solid oak with the hardness of concrete.

The wooden frame for converting to a wall clock

I cut a bar to the required length and then divided it again. This has the charming effect that the bevel is now visible on both sides and the whole thing looks good after installation! Before the frame could be used, however, it was additionally fixed with isinglass.

The frame is glued

Here you can clearly see the bevel, which is still visible after the clock has been assembled. I wanted to avoid that the clock optically “floats”, rather the frame should be discreet, but present.

As a glue, I always use fish glue from Hermann Sachse in Berlin. It is a natural material and you don’t have to worry about allergic reactions.

Final work!
The clock and frame are assembled:

The frame for the clock is waxed

First, the frame was neatly sanded. I did not photograph this part. The glued frame was finally sealed with wax. Then the shield was attached to the frame with brass nails and brass screws.

After waxing, I put the sign with the clock-face on the now finished frame.

Comtoise radio controlled clock upcycling - adapting to the frame

The wood was so hard that I had to pre-drill with a nail!

Comtoise radio clock upcycling - assembly
Comtoise radio controlled clock upcycling - the finish
It took a while for the radio signal to arrive, but now the clock is running again.

The commercially available DCF movements come with various sets of hands. Here I have opted for the slightly more playful variant. This end result is quite impressive!
My project upcycling the Comtoise clock has now been successfully completed!

The watch is now unfortunately sold. However, take a look at our Etsy shop! There you will find other interesting products from us!