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Discussion Starter · #1 ·
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
 

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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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Discussion Starter · #4 ·
Can you explain 'Lever' Clutch system > :-!

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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Zenith Forum Co-moderator
Joined
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19,146 Posts
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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Premium Member
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Discussion Starter · #6 ·
mmmm interesting reading.

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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