Richard sent in this JLC for a service. The dial and hands are in great nick, and so is the case.
Now it’s time for a look inside …
A plastic case ring, probably from a cheap quartz watch. Not something you want to find inside a JLC 🙂
The movement needs a service, too.
To make a “fitting” case ring, I start off with an aluminium blank off eBay.
I turn the inside until the movement fits snugly.
Then I turn my chuck around, and turn the outside of the ring to fit the case.
A good start – the ring fits into the case and the movement into the ring.
Now we need two holes for case screws. Every time I use these drills, I have to think “TUNGSTEN CARBIDE DRILLS??“
With a tap, I put the threads in.
Testing the fit with case clamps.
Now I can start on the movement.
A T-end mainspring, which I will replace.
The bottom plate.
The case has a very strange pendant tube, which isn’t really a tube. No chance to fit a proper waterproof crown over that, so I take it out.
I find a new pendant tube that fits, and order a new crown for it.
The movement parts are clean, and I can start putting it back together.
The balance jewels go in first.
The gear train is in.
And we have a beating movement.
Now I can put the bottom plate together. Look at the “39” scratched into the plate. This sort of stuff always gets me. What vital information was that so that it had to be scratched on the plate? IQ of the guy who did it? There is perlage decoration, and you have to take a needle to it…
The dial and hands are on.
And we have a decent performance.
The new case ring, new pendant tube and new crown.
Nice looking outside and inside.The crown is generic, but looks quite nice on the case.