Screw Standards

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  • #47999
    • Topics Started: 4
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    Do European and American pocket watches use different screw standards? How to check, use a screw plate?

    Bob Tascione
    • Topics Started: 38
    • Total Posts: 1553

    Hi Jdross99,

    Yes they do differ in many cases.
    I use screw plates to determine thead sizes.
    I also use a comparison list that Ian Wright compiled that is available on his website as a pdf download. Also when you get there check out the watch he made if you haven’t already.
    His URL is:

    Have fun and Happy Thanksgiving!


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jdross99Screw Standards