Eric from Belgium sent in this great Heuer. It’s his fathers’s watch, and I think we can all applaud his taste!
On first sight, the watch is in amazing condition.
A tiny bit of pitting on the case back, but that’s nothing to write home about.
Just the balance cock screw that is a bit damaged, but apart from that, things look pristine inside.
Eric said that the watch showed odd behaviour on the timegrapher, and he’s right. This is typical “banking”, e.g. the mainspring is too strong, and the impulse pin hits the back of the pallet fork as it goes around too far.
The hands are in as good a condition as the rest of the watch.
The bottom plate is pristine, too.
Time to take the movement apart.
With the chronograph removed, you can see the gear train.
The watch was a bit hard to wind, and here is the reason. The click wheel is a very tight fit with the plate, and there is abrasion.
The plate where the click wheel sits shows the same abrasion. I polish the click wheel to reduce the friction.
The keyless works remind me of pocket watches.
All parts are cleaned, and I will reassemble the watch with a new mainspring that is 1/100mm thinner than the one that was fitted.
And here it is – a 1.5mm x 0.12mm x 400mm.
Now I put in the balance jewels.
The gear train goes onto the plate.
And I put the keyless works in so that I can wind the watch.
Now I can fit the balance, and the movement starts beating.
Perfect – just the right amplitude, and of course no more banking.
With the movement beating as it should, I start on the chronograph.
Now I just have to adjust the depthing, and we’re there.
The bottom plate is ready for the dial.
Now I can put on the dial and hands.
The movement goes into the case.The condition of the watch is just incredible, and I’m very envious 😉