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I just restored this Schatz standard size 400 day clock with diamond-shaped dial. The movement is dated 5 60 (May 1960) on the back. I think this is one of the most beautiful of 400 day clock designs. Made in the Black Forest of Germany.

The customer told me she had just taken it to a repair shop but that they were unable to repair it. After the movement was disassembled and cleaned, I found a few things that needed doing, in addition to pivot polishing:

• The front anchor pivot was bent and needed straightening (these pivots are thin and get bent easily);
• The rear center pivot was bent and needed straightening (this pivot much thicker than the anchor pivots and is not very easy to accidentally bent);
• Two bushings had been installed in the past (I don’t recommend installing bushings in 400 day clocks) and one was not quite upright and the hole was slightly too tight. I was able to upright the hole with a cutting broach, then I used a smoothing broach to polish it.

I replaced the broken suspension spring, and the clock ran properly. Below is a video:

Here are some photos:

The movement is Horolovar back plate no. 1014A. Suspension unit 6789 with .004 inch thick suspension spring. The base has plastic leveling discs. Repair job 5029.

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2. Schatz Standard 400 Day Clock with Black and White Dial
3. Schatz Square Dial 400 Day Clock Made in 1953
4. Schatz Standard 400 Day Clock, Cream Painted Dial
5. Kern Standard 400 Day Clock with Diamond Dial