Can anyone help >>

Thread: Can anyone help >>

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  1. #1
    Member WIS_Chronomaster's Avatar
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    Can anyone help >>

    We are currently waiting to receive a ChronographieSwiss Chronograph, with a Landeron 51 Movement
    Can anyone else tell me anything more about these movements :thanks




  2. #2
    Member Marrick's Avatar
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    Re: Can anyone help >>

    If you haven't already looked it up:

    http://www.ranfft.de/cgi-bin/bidfun-...wk&Landeron_51
    Everybody is ignorant, only on different subjects."

    Will Rogers (1879 - 1935)


    Please don't PM me to ask for a valuation - I won't attempt one.

  3. #3
    Zenith Forum Co-moderator
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    Re: Can anyone help >>

    Landeron were one of the three chronograph movement makers in the ESA (Ebauches SA), the other two being Venus and Valjoux. Early on, they specialized in lever clutch systems for the chronograph so most of their output is with this. Yours will also have such a system. This makes them slightly less collectible than the Venus and Valjoux chronos of their time but a fair number of decent makers still used their movements.

    Hartmut Richter

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  5. #4
    Member WIS_Chronomaster's Avatar
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    Re: Can anyone help >>

    Can you explain 'Lever' Clutch system >

    Quote Originally Posted by Hartmut Richter View Post
    Landeron were one of the three chronograph movement makers in the ESA (Ebauches SA), the other two being Venus and Valjoux. Early on, they specialized in lever clutch systems for the chronograph so most of their output is with this. Yours will also have such a system. This makes them slightly less collectible than the Venus and Valjoux chronos of their time but a fair number of decent makers still used their movements.

    Hartmut Richter




  6. #5
    Zenith Forum Co-moderator
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    Re: Can anyone help >>

    A traditional chronograph has a column wheel - a wheel that has a serrated edge and some columns, a bit like the top of a chess castle (= rook) coming out of it to control the chronograph functions. This rotates. The lever system has a special shaped piece of metal (the "cam", I believe it's called) swivelling to and fro. Since the column wheel is three-dimensional, it has to be cut out of a block but this cam is flat, so it can be cut out of a metal sheet. The chrono expert Gerd-Rüdiger Lang (of Chronoswiss) also states that the column wheel chrono needs to be assembled by an expert whereas the lever system just requires a well-trained person of lesser standard. Therefore, the column wheel system is more expensive and therefore it is also considered haute horlogerie. You'll never find a Patek chrono with a lever system.....

    Hartmut Richter

  7. #6
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    Re: Can anyone help >>

    mmmm interesting reading.

    Quote Originally Posted by Hartmut Richter View Post
    A traditional chronograph has a column wheel - a wheel that has a serrated edge and some columns, a bit like the top of a chess castle (= rook) coming out of it to control the chronograph functions. This rotates. The lever system has a special shaped piece of metal (the "cam", I believe it's called) swivelling to and fro. Since the column wheel is three-dimensional, it has to be cut out of a block but this cam is flat, so it can be cut out of a metal sheet. The chrono expert Gerd-Rüdiger Lang (of Chronoswiss) also states that the column wheel chrono needs to be assembled by an expert whereas the lever system just requires a well-trained person of lesser standard. Therefore, the column wheel system is more expensive and therefore it is also considered haute horlogerie. You'll never find a Patek chrono with a lever system.....

    Hartmut Richter




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