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.
Considering the price of parts on this watch, it’s a little scary taking it apart;)
Movement and dial comes out from the front of the case.
This movement is very nice.
Not a single wire spring in sight.
Chronograph layer starting to come apart.
Down to the base movement.
There is a fair amount of fibres and small lumps of dirt lying around that probably explains the erratic performance.
Here you can see the gear train with the train bridge removed.
Even the setting/winding mechanism is a work of art.
Old mainspring.
I need to remember to rake out the crown wheel from the underside of the train bridge.
Watch cleaned and ready to be put back together.
I see that the balance moves freely.
Mainspring goes in the barrel.
I fit the crown wheel on the train bridge.
Base movement almost back in place.
Setting/winding mechanism goes back in place.
I now have a working base movement.
Watch is preforming very well.
I start putting the chronograph layer back in place.
Chronograph back together and everything seems to work like it should.
Very nice movement!
Nice looking Longines.
3 Responses to Service: Longines calibre: 13ZN
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.
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
That’s a 13ZN!