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  1. #1

    Default Elgin grade 772 mainspring

    My Elgin catalog predates this grade... Can anyone tell me what mainspring the grade 772 uses?

  2. #2

    Default Re: Elgin grade 772 mainspring

    I see that is 13/0 movement...
    Looks like Swigart shows a part number 6003 for a size 15/0, (Grade 559) I realize this is a slightly smaller size...
    The barrel it goes in is a 5535. Don't know if you can find dimensions and compare these parts, but hope it helps.
    Last edited by PWfanatik; 04-10-2017 at 06:47 PM.

  3. #3

    Default Re: Elgin grade 772 mainspring (By: Dave Coatsworth)

    My Elgin Service Manual states the 772 uses the same Dura Power mainspring as the Grade 730. Here's a link to this mainspring on eBay:


    Attached Thumbnails Attached Thumbnails Click image for larger version. 

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  4. #4

    Default Re: Elgin grade 772 mainspring (By: 18k BPH)

    Awesome! Thank you!

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