Seth Thomas Escapement

Discussion in 'Clock Construction' started by PowerClocks, Jun 1, 2017.

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  1. PowerClocks

    PowerClocks Registered User
    NAWCC Member

    Apr 3, 2004
    Retired Police Officer
    Queensland Australia
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    Hi to everyone on this site, I have a Seth Thomas World (long Drop) Movement (85E) that requires a new escape wheel.
    Does anyone know if the Seth Thomas No2 regulator clock escape wheel is the same as used on the Seth Thomas World model, the reason I ask is that I can obtain a No2 Escape wheel quite cheaply and if it will do the job it could save me a lot of work.
    Graeme Power
  2. roughbarked

    roughbarked Registered User

    Dec 2, 2016
    Western NSW or just this side of the black stump.
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    Have you tried measuring and counting teeth?
  3. bruce linde

    bruce linde Technical Admin
    NAWCC Member

    Nov 13, 2011
    oakland, ca.
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    according to tran, the 85E escape wheel ('crown') has the same 40 teeth as the ST2, 'center 1/18"'. the 61 movement (older ST2s) is 40 teeth, 'center 1"'... so that one would NOT work. he does not go into detail for the 77a or 77b movements.


    short answer: no.

    longer answer: escape wheel and anchor need to be matched to one another. you'll need to find a donor movement on eBay or roll your own (or have one of the people here make one for you).

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