Seth Thomas Cymbal #5 Tambour Mantel Clock Dated 1925

Here’s a Seth Thomas Cymbal #5 tambour mantel clock I repaired. This  8-day clock strikes bim-bam (two note strike) on the first, second and third quarter, and strikes the hour on the low note. The dark mahogany case is 9 1/4 inches tall and 20 1/8 inches wide. The minute hand is 2 5/16 inches long. The aluminum dial has printed numerals and minute track.

The instruction label on the back door says m-10-25, this may represent a date of October 1925.

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Repair job 7480. This clock has the No. 89K movement with a countwheel strike system that strikes quarter hours. I polished the pivots and installed 16 bushings. The strike mainspring was broken, and I replaced it with the Merritt’s Antiques MS310 mainspring, specified as 3/4 by 0.016 by 108 inches. The one I  installed actually measured 0.0167 inch thick. The original time mainspring is  0.017 inch thick.


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