I repaired this beautiful Seth Thomas Adamantine mantel clock. It has the date code 6019G (July 1906) on the bottom. The clock has black and green marbleized finish and four celluloid half-pillars. It is 11 1/2 inches tall and 17 1/8 inches wide (at the feet). The minute hand is 2 1/8 inches long. The beveled glass seems to be an unusual feature.
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Back of the movement ![]()
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Date code July 1906
Job 7035. I polished the pivots, installed 14 bushings, replaced the cracked strike mainspring with a Timesavers 15959 3/4 by 0.016 by 120 inches, and tightened the click rivets. The original time mainspring is 0.0172 inch thick, and the original strike mainspring was also 0.0172 inch thick. The movement is labeled “4 1/2” on the back, and is the same as the No. 89 movement.
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