This Schtaz standard size 400 day clock was made in August 1952. It has a special glass dome with a hole in the top for the handle to protrude. The handle has a spring loaded brass dust washer which the dome presses down slightly when it is set in place. The dome is 5 1/2 inches in diameter, 9 3/8 inches tall, with a 1 inch diameter hole. The hole in the dome should have a brass trim washer around it, which is missing on this dome.
The movement on this clock is unusual. It has one jewel bearing in the front plate (for the anchor). Most standard 400 day clocks have no jewels (however, the Schatz miniature 53 movement always has 2 jewels). There were a few 2-jewel standard Schatz movements, but this is the first I’ve heard of with one jewel!
The movement is characterized as Horolovar back plate no. 1281. The date code is 8 52.
Repair job 5476.
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