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.
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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