Lonex enquiry.
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  1. #1
    Member Worzel's Avatar
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    Lonex enquiry.

    I have strayed here from f10 as I would like to find out all I can about a friends Lonex heirloom.
    I have searched older threads here for information and generally on google. All I can find out about Lonex is that they were a brand name registered by Rolex along with many others.
    Here is the watch in question...
    Name:  lonex.jpg
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    As I understand Rolex started no earlier than 1920, I'm surprised this style of pocket watch does not pre-date that.
    The only movement marks I can see are on the Crown Wheel and Ratchet Wheel. "Swiss Made" "Lonex 15 Jewels"
    The case is gold filled - the watch all looks in good shape and well made.
    Any help would be appreciated, especially about the movement as the main spring is broken and will need replacing.
    Cordially,
    Worzel

  2. #2
    Member pithy's Avatar
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    Re: Lonex enquiry.

    Balance cock looks Cortebertish.
    Attached Images Attached Images

    Last edited by pithy; March 27th, 2018 at 17:27.
    Courtesy of ULF.

  3. #3
    Member Worzel's Avatar
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    Re: Lonex enquiry.

    Thanks Pithy - a great start.

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  5. #4
    Member pithy's Avatar
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    Re: Lonex enquiry.

    Quote Originally Posted by Worzel View Post
    Thanks Pithy - a great start.
    If you can obtain the internal dimension of the mainspring barrel and the diameter of the mainspring arbor I can calculate an optimal size for the spring.

    Catalog recommendations in millimeters below. Note: 476/477 are a little larger movements.
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    Courtesy of ULF.

  6. #5
    Member Worzel's Avatar
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    Re: Lonex enquiry.

    Thanks again.
    The watch will be going off to a watchmaker as my fingers are the size of bananas.
    According to Mr Fassbender's site the mainspring is a Zf3503, 2.00 x 16.5 x 0.21 x 470mm - I was only able to get a specification by using the information you gave me earlier.
    Last edited by Worzel; March 27th, 2018 at 18:47. Reason: spelling

  7. #6
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    Re: Lonex enquiry.

    Hi Worzel,

    it is near impossible to distinguish between the 18''' and 19''' variant after a photo. So you should take the casing diameter to identify your movement. The smaller variant (Dm= 40.2mm) has a smaller barrel and needs the spring Zf3495, 2.00 x 16.0 x 0.20 x 460mm

    Regards, Roland Ranfft

  8. #7
    Member Worzel's Avatar
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    Re: Lonex enquiry.

    Quote Originally Posted by Roland Ranfft View Post
    Hi Worzel,

    it is near impossible to distinguish between the 18''' and 19''' variant after a photo. So you should take the casing diameter to identify your movement. The smaller variant (Dm= 40.2mm) has a smaller barrel and needs the spring Zf3495, 2.00 x 16.0 x 0.20 x 460mm

    Regards, Roland Ranfft
    Roland,
    Thank you for taking the time to answer - it is 40.2mm and I will pass this information on to the watchmaker.
    On your excellent web site you mention 1915 in relation to this movement, but of course it could have been made for many years. I am trying to tie the watch to the Rolex "family" or discount that theory. 1915 is before the Rolex formation, but I read that they did use Cotebert movements early on. I can find no other references to the Lomex name.
    Do you have an opinion?
    Alan

  9. #8
    Member Dan S's Avatar
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    Re: Lonex enquiry.

    Quote Originally Posted by Worzel View Post
    Roland,
    Thank you for taking the time to answer - it is 40.2mm and I will pass this information on to the watchmaker.
    On your excellent web site you mention 1915 in relation to this movement, but of course it could have been made for many years. I am trying to tie the watch to the Rolex "family" or discount that theory. 1915 is before the Rolex formation, but I read that they did use Cotebert movements early on. I can find no other references to the Lomex name.
    Do you have an opinion?
    Alan
    From mikrolisk.de . There does appear to be a Rolex connection.

    Word trade mark Manufacturer Location and details
    Lonex Hans Wilsdorf / Rolex WatchCo. Uhren, Uhrenteile; Biel, Schweiz; registriert am 24.9.1920
    -- Dan (formerly known as @badbackdan)
    ------- @oldwatchdan on Instagram -------

  10. #9
    Member Worzel's Avatar
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    Re: Lonex enquiry.

    Quote Originally Posted by badbackdan View Post
    From mikrolisk.de . There does appear to be a Rolex connection.

    Word trade mark Manufacturer Location and details
    Lonex Hans Wilsdorf / Rolex WatchCo. Uhren, Uhrenteile; Biel, Schweiz; registriert am 24.9.1920
    Thank's Dan, I just wonder if Rolex picked up an abandond name and this Lonex was pre-1920.

  11. #10
    Zenith Forum Co-moderator
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    Re: Lonex enquiry.

    Quote Originally Posted by Worzel View Post
    Roland,
    Thank you for taking the time to answer - it is 40.2mm and I will pass this information on to the watchmaker.
    Be very careful! Old pocket watch movements had a hidden "lip" that could only be seen from the dial side so if you measure the back and find it to be 40.2mm, once you take out the entire movement, it might actually be 43mm! The same with my Zenith Cal. 19''' N.V.S.I - 40.5mm from the back, 43.15mmm when you take it out.....

    The bottom line: have the watchmaker measure the movement first, then order the parts.

    Hartmut Richter
    busmatt likes this.

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