Here is a beautiful old Seth Thomas “World” drop octagon wall regulator I repaired recently. The oak case is 32 inches tall, with a 11 inch painted dial. The customer brought the clock to me because it had been damaged in shipping. I straightened the bent center arbor and replaced the glass in the bezel
Repair job 7534. I polished the pivots and installed 9 bushings. This is the No 40 movement that runs 15 days on a winding. It is time-only and has two very thin mainsprings.
- Left mainspring: 3/4 by .0147 inch
- Right mainspring: 3/4 by .0158 inch
The Graham deadbeat escapement makes this movement run efficiently, so the thin mainspringsvsprings provide plenty of power but don’t cause excessive wear.
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