Seth Thomas Adamantine Mantel Clock, Gold Flecks over Greenish-Brown

Here a beautiful and uncommon Seth Thomas Adamantine mantel clock I repaired. The case color is gold flakes over brownish-green and is quite stunning in appearance. The case is 17 3/8 inches wide and 11 3/16 inches tall. The dial’s minute track is 4 1/4 inches in diameter and the minute hand is 4 1/4 inches long.

I removed the trim and polished the case. The Adamantine finish (celluloid over wood) almost always polishes very well.

  • Instructions on back door
  • Back of movement
  • Front of movement

See more pictures.

Repair job 7476. I polished the pivots, installed 12 bushings, and replaced the click rivets (to make the winding reliable). The original time mainspring is 3/4 inch wide and 0.0174 inch thick. I replaced the strike mainspring with a Merritt’s antiques MS310 – 3/4 by .0167 by 108 inch.


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