Seth Thomas Tambour Mantel Clock with ST Hands

This Seth Thomas tambour mantel clock has a heavy brass dial that is engraved and silver plated. It was made around 1910 – 1920. The hands are the modern “ST” style, with the minute hand having an “S” at the base and the hour hand having a “T”. A different style of ST hands were used back in the 1860s.

The case is 19 1/2 inches wide and 9 1/4 inches tall. The minute hand is 2 5/16 inches long. The movement is the no. 89J. It is similar to the standard no. 89, with the addition of a two-piece back plate.

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I did limited repair on the movement, cleaning it, polishing a few pivots and installing 3 bushings. Three screw-in bushings had been installed in the past, these are not good to use, but some repairers use them because they could be installed without dismantling the movement. The screw-in bushings are large and ugly.

The original mansprings are the following sizes:

Time: 3/4 x 0.0165 inch

Strike: 3/4 by 0.0161 inch

The pendulum bob is gold painted lead, 1 3/4 inch diameter, weight 5.4 ounces.

Repair job 5586.


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