Seth Thomas “Sentinel #10” Tambour Mantel Clock

I recently repaired this Seth Thomas tambour mantel clock. It needed to have the pivots polished and 14 bushings installed.

This clock was a good example of original thin Seth Thomas mainsprings. The time mainspring is 3/4 inches wide and 0.0159 inches thick. It is in good condition and was retained in the clock. The strike mainspring was 0.0164 inches thick. I intended to keep it in the clock, but it broke after cleaning, so I installed a 3/4 inch wide, 0.0165 inches thick, and 96 inches long, Merritt’s Antiques part no. P-1956.

Here is a slideshow of the clock and its movement, and also the label on the bottom of the case:

Here is a movie of the clock ticking and striking:

Repair job 4854. The clock is 19 1/2 inches long.

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  1. I estimate that it was made around 1920 – 1930, but I have not found it in any of my catalogs.

  2. Do you know the date this clock was produced? I recently inherited this clock and am trying to date it. Thank you.


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