How does Ball modify there 7750 movements?

Thread: How does Ball modify there 7750 movements?

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  1. #1
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    Oct 2008
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    How does Ball modify there 7750 movements?

    I am considering purchasing a Ball Fireman Ionospere. I see it comes with the ETA/V 7750 movement. I know the 775X movements come from ETA in a number of different finish levels. What level does Ball start with and how do they modify it?

    Thanks!

    Andy

  2. #2
    Member scottw44's Avatar
    Join Date
    Aug 2006
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    3,558

    Re: How does Ball modify there 7750 movements?

    standard 7750, I believe it uses the elabore grade. Ball tunes the watches for +/- 10 seconds but most Balls I have seen or heard about run much tighter, or are easily regulated to perform better.
    kind regards,

    scott

    vintage and obscure watch lover

  3. #3
    Member
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    Jan 2008
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    Re: How does Ball modify there 7750 movements?

    It just standard grade with nice decoration ie. golden lettering on latest see-thorugh case back watch. If it is COSC, then better grade but also in turn of finishing like well polished etc.

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