Schatz Midget 400 Day Clock Made in 1962

May 11, 2015 | By | 5 Replies More

Schatz made 3 sizes of 400 day clock: Standard, Miniature and Midget. The Standard 400 day says “49” on the back inside a circle, the miniature says “53”, and the midget says “JUM/7”. Can anyone tell me what “JUM/7” means?

The midget 400 day clock is slightly shorter than the miniature. I recently repaired a midget dated 9 62 (September 1962), and its height without the dome is 5 9/16 inches. A similar-looking miniature that I repaired (see Schatz Miniature 400 Day Clock, March 1956) is 7 inches tall to the top of the decoration above the dial.

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Schatz Midget 400 Day Clock made in September 1962

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Back view of the Schatz Midget. Note the plastic cover to protect the top block and fork of the suspension spring.

IMG_3028See more pictures.

The midget movement has a pin-pallet escapement instead of a Graham deadbeat.

Repair job 6631. I polished the pivots, smoothed some damaged teeth on the mainspring barrel, and replaced the suspension spring. I used a 0.0022 inch thick Horolovar suspension spring (a previous clock of the same model I repaired (see Schatz Midget 400 Day Clock Made in 1968). needed a 0.0023 inch thick spring (I’m not sure if the difference was in the suspension springs or the pendulum).


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Category: 400 Day Clock Repair, Schatz 400 Day Clock History

Last updated: May 9, 2015

Comments (5)

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  1. Dale Burrell says:

    “JUM7” could mean an abbreviation for the German words for “year timepiece manufacturer, 7 inches tall”

  2. Bill Stoddard says:

    It may need to be taken apart and cleaned. The suspension spring may be bent or twisted. Or it may just be “out of beat” (not ticking evenly) which can be corrected by rotating the top block of the suspension spring to equalize the motion in both directions.

  3. Doug says:

    Thanks Bill,I’ll keep looking. I just acquired a “Midget”. Everything seems to move but will not stay running. Any ideas you want to pass along?

  4. Bill Stoddard says:

    Yes, but this doesn’t answer my question as to what it means – for example, is it German for something or is it arbitrary letters and a number? The Standard and Miniature 49 and 53 represent the years of introduction.

  5. Doug says:

    On this page –> https://www.google.ca/search?q=JUM%2F7&oq=JUM%2F7&aqs=chrome..69i57j69i58&sourceid=chrome&es_sm=122&ie=UTF-8

    Is an anniversary clock identification PDF. It appears that JUM/7 is the ID code for the clocks movement.

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