If it’s a Rado, it has to be Chris’s watch 😉 He got this lovely Diastar from Japan, and it’s not ticking at all. A very unique design, with the faceted crystal and the oval case.
Let’s see what’s wrong…
On first sight, nothing much wrong here. Looks clean enough, and no visible damage.
The dial and hands have some damage, but are still in decent shape.
A lot of rust on the date change wheel, and on the date change spring.This isn’t too good, either. Time for a good clean!
The gear train.
All still in good shape.
Just the wheel bridge left.
The mainspring is still looking good, and continues to do so once it’s out of the barrel, so I will leave it.
Another view of the rust damage on the bottom plate.
The date set spring.
As you would expect, there is a fair amount of rust and dirt under the date change wheel.
The date ring got some damage as well, but that will clean up nicely.
Told you so 😉
I clean up the rust with a fibreglass brush, and then soak the parts in citric acid, and then everything goes into the cleaning machine.
After the cleaning machine – looking good.
I start off with the balance jewels.
The clutch doesn’t sit on the cannon pinion, and it’s a bit loose, so I’m giving it a tiny squeeze under the microscope.
Barely wound, this is the first graph of the movement, and it’s looking good.
The bottom plate cleaned up nicely, too.
And the dial goes back on.
Hands in place.
Movement cased without the auto winder assembly.
The odd thing is that the auto winder only winds in one direction – I would have expected a bi-directional winder on such a high-spec movement.
A final adjustment.Very nice indeed!