Service: Longines calibre: 13ZN

Longines 13ZN

Here is probably one I would really like to own! A client sent in this lovely Longines calibre 13ZN that stops intermediately and in need of a service. 

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Considering the price of parts on this watch, it’s a little scary taking it apart;)

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Movement and dial comes out from the front of the case.

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This movement is very nice.

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Not a single wire spring in sight.

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Chronograph layer starting to come apart.

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Down to the base movement.

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There is a fair amount of fibres and small lumps of dirt lying around that probably explains the erratic performance.

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Here you can see the gear train with the train bridge removed.

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Even the setting/winding mechanism is a work of art.

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Old mainspring.

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I need to remember to rake out the crown wheel from the underside of the train bridge.

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Watch cleaned and ready to be put back together.

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I see that the balance moves freely.

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Mainspring goes in the barrel.

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I fit the crown wheel on the train bridge.

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Base movement almost back in place.

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Setting/winding mechanism goes back in place.

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I now have a working base movement.

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Watch is preforming very well.

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I start putting the chronograph layer back in place.

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Chronograph back together and everything seems to work like it should.

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Very nice movement!

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Nice looking Longines.

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3 Responses to Service: Longines calibre: 13ZN

  1. Michael Pilkington says:

    What a gorgeous watch. The engineering is exquisite.
    Mitka, I see you arrange the screws in Rodico, good idea. Do you put them through the cleaner first? I’m not sure whether it’s worth the bother,though I do.

    Like

    • mitka88 says:

      Sometimes I get some new Rodico and place the screws on it as it makes it easier to find the correct screws and keeps the screws safe if I was to flip the parts container (has happened)… I always clean the screws. In some scenarios if the screws are super tiny I only clean them in Rodico as they otherwise could get lost.

      Best regards,

      Mitka

      Like

  2. matabog says:

    That’s a 13ZN!

    Like

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