Tavannes cal?

Discussion in 'European & Other Pocket Watches' started by Horologist, Aug 3, 2007.

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  1. Horologist

    Horologist Registered User

    Jul 26, 2007
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    Need a little help to identify this vintage Tavannes pocket watch movement.
    Anyone know which cal is this?
    Thanks. :thumb:

    http://img252.imageshack.us/img252/7839/k338cgg9.jpg
     
  2. Horologist

    Horologist Registered User

    Jul 26, 2007
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    oops, posted in the wrong section.
    maybe the mod can help me shift this to the European & Other Pocket Watches?
    sorry about it. :bang:
     
  3. Tom McIntyre

    Tom McIntyre Technical Admin
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    Aug 24, 2000
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    Other than 8 day, I don't know what they called it.
     
  4. RON in PA

    RON in PA Registered User
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    May 18, 2005
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    Possibly a "Pleiades". Note the arrangement of the jewels, similar to the astronomical object.
     
  5. Don Dahlberg

    Don Dahlberg Registered User
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    Aug 31, 2000
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    It is a Tavannes Watch Co.
    Cal 17''' - 10
    Ref.
    700/702 Sav.
    701/703 Lep.
    (Pleiade)

    Other than the size, I have no idea what most of that means, but that is what it is. :?| This is all in French and I had to leave several accents off various letters when typing them. This should be close to a 12 size movement. It was being produced in the 1930s, at least that is when my source was published.

    Tavannes actually made watches, unlike most Swiss brands you see. They were located in Chaux de Fonds.

    Don
     
  6. RON in PA

    RON in PA Registered User
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    This is a question for Don: It's nice to have one's suspicions verified by the more knowledgeable, what is your source of info. The reason I ask is because I just obtained a 15J PW marked "Advance" which is one of Tavannes's trademarks. Pritchard has a number of pages on Tavannes, but doesn't get into movements.
     
  7. Horologist

    Horologist Registered User

    Jul 26, 2007
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    Hi Don, thanks for the info. :thumb:
    So this is a Tavannes cal. 017?
    I'm actually looking for replacement balance staff for it so have to be sure.
     
  8. watchfriends

    watchfriends Registered User

    Jul 23, 2007
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    I saw this calibre first time in ebay and i ever thought that is an 8 day watch.

    But it isn't... is there an fake jewel? It is much interessted
     
  9. Horologist

    Horologist Registered User

    Jul 26, 2007
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    I've took a couple of pictures to show you the gear train.
    The movement is not in running condition so i really don't know
    but i don't think it's a 8 days movement too. :?|
    Why is it made this way? maybe someone else will be able to answer that.

    26.jpg

    http://img522.imageshack.us/img522/6240/2smallhn6.jpg
     
  10. Jerry Treiman

    Jerry Treiman Registered User
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    Maybe the movement was layed out like this for thinness? You will note that the center arbor has a pinion only - no wheel - so this normally large center wheel does not have to lie over or under the balance wheel. The next wheel in the train is the steel wheel which is an idler wheel with no pinion - all it does is reverse the train and get the gear train out from over (or under) the balance wheel. There are then two standard wheels with pinions to gear it down to the wheel that has the seconds hand. The extra gear also reverses the direction again so that the seconds hand turns properly. What is normally the 4th wheel is the 6th in this watch. These commonly have 21 jewels, with full pairs of jewels on most of the train, an upper center wheel jewel and an upper cap on the escape wheel.

    It is just a one day movement.
     
  11. Don Dahlberg

    Don Dahlberg Registered User
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    Aug 31, 2000
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    Ron,

    The library has two books from the 1930s that show pictures of the movements of the major Swiss manufacturers of ebauche movements. I cannot remember the titles. The next time we are at the library together, I'll show you where they are hidden. :)

    I cannot gurantee my identification. People never include the size of the movement when they ask these questions. All I did is match the bridge appearance. If Tavannes used the same plate configuration on a different model that was not pictures, I could be off base.

    Horlogist needs to confirms that his movement is 17''' - 10 in size. All I can say is that his picture matches the one I have down to the screw positions.

    As far as finding a balance staff. Most of us have stashes of Swiss staffs that we purchased before we knew better. It is more of a question of measuring the old staff and then running through the stash hoping to find one to match. I don't know if you can order a staff for a specific Swiss ebauche movement from the early 1900s. Maybe if we lived in Switzerland, but not here.

    Don
     

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