Seth Thomas #89 movement descriptions

Discussion in 'General Clock Discussions' started by paclockman, May 15, 2019.

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  1. paclockman

    paclockman Registered User

    Feb 14, 2009
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    Hello,

    I recently had the need to replace a Seth Thomas #89 movement. The needed movement was a plain 89 which I had no problem locating. I realized that there are quite a few different models of an 89 and was wondering if there is a listing online of the different models and what they were used for and what makes them different from a plain 89.

    Thanks!
     
  2. Isaac

    Isaac Registered User

    Aug 5, 2013
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    Many of these models came with different features as you've noted. They could have removable subplates for easy access to the mainsprings, solid back plates, solid pinions for the strike fan arbor, strike on a bell for half hour, etc. They also came with configurations to work in synchronization with the Sonora chime movements. There was a thread posting some time back about the different models of the 89 movement, albeit I do not remember its title.
     
  3. Dave T

    Dave T Registered User
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    Dec 8, 2011
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    From the May 1st, 1907 Factory List:
    Seth Thomas 89 movements.jpg
     
  4. Willie X

    Willie X Registered User

    Feb 9, 2008
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    There was also an 89AL with solid back plate. And a 89L which is a quarter striker, with a split back plate to allow for easy spring replacement.

    I have brought this up before, about wishing someone would make a defenative list of these S-T numbers along with the dates when they were made.

    This task probably sounds a lot easier than would actually be. Ha

    Willie X
     
  5. Time After Time

    Time After Time Registered User
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    Feb 22, 2010
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