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Odd mainspring outer hooking arrangement in a LeCoultre 481

Stian

By Stian
in Watch Repairs Help & Advice

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Stian WRT Addict

Stian

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Hello gurus, 

I'm working on an old LeCoultre watch with a 481 bumper movement. When taking the barrel apart, I found that the outer hooking does not stop against a notch in the barrel, rather there's a ring inside that barrel, see picture. 

Have you seen this arrangement before, and most importantly, can I use the mainspring winder to get the mainspring properly into the barrel again? 

--

Thanks, 

Stian

IMG_20170625_100258.jpg

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rogart63 Distinguished Member

rogart63

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It's an automatic. If so it could be some kind of slipping thing. Or it can be broken? There shall not be a notch in the barrel as the movement is a bumber. I would get a new mainspring as it looks a little strange? 

Size for the mainspring is in the text. Somebody did shorten that mainspring so i guess the a easy to break? 

http://watchguy.co.uk/service-jaeger-lecoultre-automatic-calibre-481/

Edited by rogart63
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Stian WRT Addict

Stian

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Facepalm for the notch indeed :)

Thanks for your response! The spring is not broken, so this seems to be the friction slipping contraption probably way back then. I guess I can put this in first and then use the mainspring winder for the mainspring itself? If it goes wrong I can always order a new mainspring, I have the measurements.

Stian

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