Seth Thomas Mark I Deck Clock

Discussion in 'Clock Repair' started by wbranko, Oct 31, 2019.

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  1. wbranko

    wbranko Registered User
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    Feb 1, 2004
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    I'm repairing one of these and have a number of issues, however here is question #1.

    I opened the mainspring barrel and was greeted by a REALLY BAD smell. Nothing like the ghost of oil/grease past to visit the shop on halloween! After removing the spring and cleaning, I measured it as follows:

    5/8 in wide
    .011 in thick
    about 89 in long

    It looked a little set (probably the original from 6/43), so I went to my trusty Timesavers and Merritts catalogs. Nothing in there like these dimensions. Now, I know there are LOTS of these out there. What is everyone using for a replacement spring? The closest I found was Timesavers 16806:

    .63 in wide (OK)
    .018 in thick (probably way too strong?)
    96 in long (probably OK)

    Anyone have a better solution? Or know of where the exact replacement might be?

    I'm toying with the idea of using the old original?

    Ideas?

    Thanks!

    Bill
     
  2. Uhralt

    Uhralt Registered User
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    Sep 4, 2008
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    This one for a Chelsea ships clock might work:

    No 34025 16.6 x 0.28 x 2135 mm. It's the closest I could find. Make sure that the width will fit. It is a bit wider. Personally, I would try the old spring first. It may work well enough.

    Uhralt
     
  3. dickstorer

    dickstorer Registered User

    Oct 19, 2010
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    You said it looked a little set---even if it were a lot set it would probably work. Give it a try.
     
  4. shutterbug

    shutterbug Moderator
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    Oct 19, 2005
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    I agree. The spring you have is likely much better than a new replacement might be. Mainsprings are RARELY the issue when clocks are having troubles.
     
  5. wbranko

    wbranko Registered User
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    Thanks to all...I will grease and reinstall the old spring as suggested!
     

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