Chronograph Suisse - Landeon 47?

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  1. #1
    Member Marrick's Avatar
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    Chronograph Suisse - Landeron 47?

    My latest extravagance is this unbranded Chronographe Suisse watch. It works well, and has a very clean gold coloured dial. The movement is unsigned, but looks most like a Landeron 47 to me. In which case, it would be from the late 1930s (according to Ranfft: 1937 first chronograph with cam switching just shortly produced predecessor of the Landeron-48 family).

    But I would welcome a second opinion.
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    Last edited by Marrick; January 17th, 2008 at 20:28. Reason: Spelling

  2. #2
    Member Ray MacDonald's Avatar
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    Re: Chronograph Suisse - Landeon 47?

    A beautiful piece all right. I'll let the chrono-experts help you though, Marrick. I have trouble enough with pocket watches.

    There are fathers who do not love their children; there is no grandfather who does not adore his grandson. ~ Victor Hugo

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    Member Marrick's Avatar
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    Re: Chronograph Suisse - Landeon 47?

    Quote Originally Posted by Ray MacDonald View Post
    A beautiful piece all right. I'll let the chrono-experts help you though, Marrick. I have trouble enough with pocket watches.
    Thanks Ray. I was very pleased when I got it - this was the photo it was sold with:
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    Member Ray MacDonald's Avatar
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    Re: Chronograph Suisse - Landeon 47?

    Bad photo=low interest=good deal for you. You ever take notice of Tom's (pacifichrono) photos? That's the way to do it right.

    There are fathers who do not love their children; there is no grandfather who does not adore his grandson. ~ Victor Hugo

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    Member Marrick's Avatar
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    Re: Chronograph Suisse - Landeon 47?

    Quote Originally Posted by Ray MacDonald View Post
    Bad photo=low interest=good deal for you. You ever take notice of Tom's (pacifichrono) photos? That's the way to do it right.
    Oh yes - I always look at Tom's photos. My camera - and skills - are not in the same league. But even with a basic digital camera and simple photo software (I use MS 'Picture It!') its possible to get clear pictures. But buying from dark, tiny, or blurred pictures is always a gamble - I've made quite a few bad purchases as well as a few good ones. On the good side, just bought (arrived an hour ago) this lot for a 'buy it now' of £12. There's a Marvin, a MuDu, some rubbish AND a solid 9ct gold Rotary in there! Back to playing with 'em.
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    Re: Chronograph Suisse - Landeon 47?

    Hi Merrick,

    model changes of Landerons were always floating, because almost all parts
    were interchangable between the members of what I'd call the 48 family.

    There are only minor differences between Landeron 47


    and Landeron 48


    1) The chrono cock of the 47 has a gap to access the dial screw, while in
    the 48 it is shaped not to cover the screw.

    2) The upper corner of the balance cock of the 48 was cut to give more
    space for the head of the movement mounting screw. In the 47 this curve
    is missing.

    3) The minute recording jumper is adjustable with an excenter in the 48
    while it fixed in the 47.

    4) The clutch levers have different shapes.

    If you compare the details with your movement, you'll agree that ist is a
    Landeron 48 with the unadjustable jumper of the 47. As this jumper is one
    of the few not interchangable parts, you can be sure that it is a very early
    Landeron 48.

    Regards, Roland Ranfft

  8. #7
    Member Marrick's Avatar
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    Re: Chronograph Suisse - Landeon 47?

    Fantastic! I don't have much knowledge of the terminology; but I think I know what you mean. Early 48 it is. Many thanks Roland for such a full explanation.

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    Re: Chronograph Suisse - Landeon 47?

    Quote Originally Posted by Roland Ranfft View Post
    Hi Merrick,

    model changes of Landerons were always floating, because almost all parts
    were interchangable between the members of what I'd call the 48 family.

    There are only minor differences between Landeron 47


    and Landeron 48


    1) The chrono cock of the 47 has a gap to access the dial screw, while in
    the 48 it is shaped not to cover the screw.

    2) The upper corner of the balance cock of the 48 was cut to give more
    space for the head of the movement mounting screw. In the 47 this curve
    is missing.

    3) The minute recording jumper is adjustable with an excenter in the 48
    while it fixed in the 47.

    4) The clutch levers have different shapes.

    If you compare the details with your movement, you'll agree that ist is a
    Landeron 48 with the unadjustable jumper of the 47. As this jumper is one
    of the few not interchangable parts, you can be sure that it is a very early
    Landeron 48.

    Regards, Roland Ranfft
    Hello,

    I am new to this forum, I want to ask Roland about my watch, is it L47 or L48. The watch is here:


    I found these differences:

    No. 1 and 2 are accodring to L48.
    No. 3,4,5 and 6 are according to L47.
    What type is my movement?
    Last edited by emilmaga; March 5th, 2011 at 09:18.

  10. #9
    Member Eeeb's Avatar
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    Re: Chronograph Suisse - Landeon 47?

    This looks to be as Dr. Ranfft said -- these movements could be a mix-mash of pieces from both families. Yours looks to be mostly a 47.

    I have found these to be very interesting movements. They seem fairly accurate and reliable. I have a NOS piece that has been at my watchmaker's for almost a year. He needs to construct one of the springs. Evidently it broke while the watch was fairly new and sat, unfixed, in a drawer for fifty years. (I gave him a source on the Internet but he says he prefers to do it himself...) I don't push him. He knows how many watches I have

    (He says he likes working for collectors -- they rarely push him to do work quickly because they now "have no watch" LOL)
    "Forever is composed of nows." - Emily Dickinson

    "The watch has to be surrounded by a history.
    You need more than just a great design. You need to create an atmosphere around the product.
    Who is the company behind it? Why are they using this material?
    People need to be able to identify the watch with themselves. It's based on emotion." - Ralph Furter

    ...that's just my opinion and I've been wrong before and will be again and might be now!

  11. #10
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    Re: Chronograph Suisse - Landeon 47?

    Thanks for the reply, these mechanisms are really interesting because of their evolution. I found an old documentation where the Landeron 47 and Landeron 48 are completely different from those presented by Dr. Ranfft:


    I can not wait for mine to come from repair, I hope it will last another 60 years ;)

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