Schatz 1000 Day Clock

In 1954, Schatz introduced their 1000 Day Clock. The 1000 day clock is based on Schatz’s miniature 400 day clock movement (see Why 400 Day Clocks Run So Long). A larger mainspring, with about 2.5 times the amount of energy storage, is used, but the gears and escapement are similar. The pendulum makes 10 rotations per minute.

Here are videos of the 1000 day clock in operation, and a closeup view of the escapement:

Here are some photos of the 1000 day clock:

This clock is dated 8-57 (August 1957) on the movement and is part of my clock collection.

The 1000 day clock uses a 0.0024 inch thick Horolovar suspension spring, or complete suspension unit number 10B. See this post for information on ordering suspension springs or units.

Share this post:



  1. Hi Bill,
    Sorry for not getting back to you sooner.
    This is what’s going on:
    For every 5 minutes on the Schatz it takes 10 minutes real time.
    Is it possible that maybe it needs another gear?
    John D

  2. I can’t see any reason why it would be going half as fast as normal. It should make 10 half oscillations per minute. How much time is it losing?

  3. Greetings,
    I have been trying to increase the ball speed of my 1000 day clock, 1954. I have replaced the spring (.0024) and have the clock running but it only travels 5 balls per minute instead of 10. Running the speed adjusment nut to the fast direction doesn’t help any.
    Looking forward for your suggestion.
    Thank You,
    John D.

Leave a Reply

Your email address will not be published.

This site uses Akismet to reduce spam. Learn how your comment data is processed.