Chronometre Mephisto. Ancre
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  • 2 Post By laikrodukas
  • 2 Post By Roland Ranfft
  • 1 Post By AbslomRob
  • 3 Post By eri231

Thread: Chronometre Mephisto. Ancre

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  1. #1
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    Chronometre Mephisto. Ancre

    Hi,

    Found this in local market today






    Has no crystal and funny minute hand... One jewel has hairlines so when You set time backwards, second hand stops. Otherwise keeps from +2 to -2mins in various positions
    Enamel dial is in perfect condition

    Any dating for it? 1920s?
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    Chaos is my focus

  2. #2
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    Re: Chronometre Mephisto. Ancre

    Hi there,

    Quote Originally Posted by laikrodukas View Post
    ...and funny minute hand
    Not funny, just broken off.

    Quote Originally Posted by laikrodukas View Post
    One jewel has hairlines so when You set time backwards, second hand stops.
    Except the balance, where it depends on the position where the pivot is touching the jewel, all jewels are only touched by the pivot at one particular spot. So a crack has only any influence if it is precisely at this spot. Whether a watch stops or even runs reverse when reverse setted depends only on the friction of the cannon pinion on its post. Oppinions vary: Some even believe that the energy in the balance is sufficient to crack pallet jewels, but as long as sapphire is used to cut hard materials on a lathe, I have a hard time to believe it. For my taste, stopping and not yet running revers is the optimum amout of cannon-pinion friction.

    Quote Originally Posted by laikrodukas View Post
    Otherwise keeps from +2 to -2mins in various positions
    Not excitingly good, but quite common for an old watch which wasn't treated carefully all its long life. This indicates bent balance pivot(s), but not so serious that it can't be corrected with timing washers.

    Quote Originally Posted by laikrodukas View Post
    Any dating for it? 1920s?
    After the dial style mid to late 20s.

    Regards, Roland Ranfft
    Last edited by Roland Ranfft; August 16th, 2014 at 14:15.
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  3. #3
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    Re: Chronometre Mephisto. Ancre

    Thanks for such valuable info!
    What is timing washers?
    Chaos is my focus

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  5. #4
    Member AbslomRob's Avatar
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    Re: Chronometre Mephisto. Ancre

    Hah...nothing that anyone but an old watchmaker would even know about, let alone use...timing washers are exactly what they sound like; little washers that you put on the balance wheel (on the timing screws) to adjust the timing. Weight, basically. But they're very very "precise" weights such that you can look at current rate of the watch and quickly calculate how many pairs of washers you need to put on the balance to bring it in line.
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  6. #5
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    Re: Chronometre Mephisto. Ancre

    Mephisto was one of the many trademarks of the house Langendorf Watch Co.

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    regards enrico
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