RSSCategory: 400 Day Clock Repair

Kern Standard 400 Day Clock with Diamond Dial

January 27, 2009 | By | Reply More
Kern Standard 400 Day Clock with Diamond Dial

I just repaired this clock. I polished 6 pivots and replaced the suspension spring. Here are the gears and anchor before the back plate was put on, and the complete clock: Here is a video of the escapement action: Here is the entire clock operating (with background chime accompaniment: Job 4780 Back plate: 1404 Suspension […]

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Last updated November 26, 2009

Kundo Miniature 400 Day Clock

January 24, 2009 | By | 1 Reply More
Kundo Miniature 400 Day Clock

Here is a Kundo miniature 400 day clock that I just finished giving a general service and repair. The pivots were in good condition, but it needed cleaning and a suspension spring replacement. The photo below shows the gears and anchor before the back plate was put on, and the complete clock: Here is a […]

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Last updated November 26, 2009

The Upper Suspension Block Must Fit the Saddle Correctly

June 21, 2008 | By | Reply More
The Upper Suspension Block Must Fit the Saddle Correctly

A recent repair job on a Kundo oval base 400 day clock reminded me that the upper suspension block must fit properly in the saddle. I cleaned the movement and replaced the suspension spring. It did not need any pivot polishing. After assembly, the clock ran, but the pendulum made a small rotation even when […]

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Last updated November 27, 2009

My Clock Is “Wound Too Tight!”

February 23, 2008 | By | 1 Reply More
My Clock Is “Wound Too Tight!”

Lately several people told me me that their 400 day anniversary clock was “wound too tight”, and that they tried to fix it by unwinding the spring! Trying to unwind the spring is DANGEROUS (unless you are experienced at clock repair and have the proper let-down key). If you try to unwind the spring, YOU […]

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Last updated December 22, 2013

Herr 400 Day Clock with Rough Pivots

November 6, 2007 | By | 2 Replies More
Herr 400 Day Clock with Rough Pivots

I just repaired a standard size 400 day clock by Herr (Horolovar back plate #1159). This clock seems to be a copy of the Schatz standard 400 day clock (movement model 49) but is not as well finished. This clock needed more pivot polishing than most 400 day clocks. Quite often a Schatz 49 will […]

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Last updated May 21, 2010

Setting Suspension Fork Height on Schatz and Kundo Standard 400 Day Clocks

October 7, 2007 | By | 4 Replies More
Setting Suspension Fork Height on Schatz and Kundo Standard 400 Day Clocks

After repairing numerous Schatz and Kundo standard size 400 day clocks recently, I have noticed that sometimes the optimum suspension fork location is different than that shown in the “Horolovar 400 Day Clock Repair Guide”. Specifically, for Kundo units such as 1 and 3C, I often find that the fork should be slightly higher. For […]

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Last updated November 27, 2009

400 Day Clock Suspension Spring Sizes

July 9, 2007 | By | 73 Replies More
400 Day Clock Suspension Spring Sizes

A company called Horolovar makes suspension springs for 400 day clocks. Various thicknesses are available. If the spring is too thick the clock will gain time, and if too thin it will lose time Suspension Spring Thickness for Schatz 400 Day and 1000 Day Clocks Schatz clocks have a model number inside a circle on […]

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Last updated April 8, 2012