Seth Thomas Dark Mahogany Tambour Mantel Clock, ca. 1920

This Seth Thomas tambour mantel clock is very plain, yet is a great example of an old clock of classic design that will be reliable for many years. It has the No. 89 movement, very reliable and efficient, and one of their best movements, in my opinion. The clock is 17 inches wide, 9 1/8 inches tall. The minute hand is 2 5/16 inches long. The dial is silver-plated brass with printed numerals. The heavy wire gong (often called Cathedral gong) gives a very rich tone.

Tran Duy Ly’s book “Seth Thomas Clocks and Movements, Third Edition, Volume 3” shows this clock is called “Tambour 12”, 1922 version.

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Sold 7-26-12. Installed 11 bushings. It has the original mainsprings:

  • Time mainspring: 3/4 by 0.0176 inches
  • Strike mainspring: 3/4 by 0.0173 inches

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  1. Hi Mr. Stoddard,
    I have a Seth-Thomas mantel clock, very similar in appearance to this one, although the wood is slightly lighter in color and it appears to be slightly wider horizontally at the base. My clock has a number 89 embossed on it’s movement, the face says it was made by Seth Thomas in the United States. It chimes twice an hour, and runs fast, the F/S adjustment doesn’t seem to work anymore. Otherwise it runs reliably, I took it to a professional in Seattle be cleaned a few years ago, and she was very complimentary. We didn’t discuss the F/S issue, I didn’t know about it because I had just received the clock as a gift from my mother.
    I am 64 years old and this clock is the sound of my childhood. It was one of two clocks found left in an apartment in Los Angeles that my father’s brotther and his wife rented, and was given to my parents early in their marriage, before I was born.
    Can you tell me anything about my clock, or tell me where I can find out when it was made? What can be done about it running fast — it gains 4-5 minutes a day?
    This article has already been helpful and is much appreciated. Thank you for any additional help you can provide.

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