This is one of Eric’s watches, who sent it in from Belgium.
The ideal watch if you are invited to a posh evening do, and you want to time how long it takes from opening the buffet until the first fight breaks out.
It’s been quite a while since the last service, so let’s see…
The whole watch is in great condition.
Side view of the case.
Not too tragic, but a service won’t hurt. The main reason for the service isn’t the movement performance, but that the chronograph second hand jumps when the chronograph is engaged.
With the movement taken out, I separate the chronograph from the base movement, and ETA2892A2.
The movement is gilded. There is some dirt and corrosion on the auto winder gears.
I start off by taking apart the ETA movement.
The mainspring doesn’t look too bad.
The fourth wheel with the pinion that drives the chronograph.
I clean movement and chronograph layer separately.
Now it’s time to take apart the chronograph.
I have to proceed with caution here, as there are no parts whatsoever available for the chronograph. Omega only swaps the whole unit for an overhauled one.
Slowly does it…
I also take out and clean the pushers.
All the chronograph parts cleaned and ready.
Reassembly starts with the base movement.
With a new mainspring of course.
Once that’s in the barrel, I put the balance jewels back in.
Now I reassemble the gear train.
And then put together the bottom plate.
The movement is ready for the chronograph.
I have the detailed Omega assembly instructions. I do substitute Moebius D5 with HP 750, the more modern equivalent, which runs a lot less and stays where it should be.
This is a fairly long process, oiling and checking each component as I go along.
Nice finishes throughout.
You can see the wheels of the hour and minute recorder, and the sub-second arbor at around 10 o’clock in the photo.
Finally, the chronograph is back together and adjusted.
Now I can put the base movement on top.
And put the dial and hands on.
The auto winder goes on once the whole unit is cased.
The whole watch is in super condition.
And this is what I expect…. Even with the fairly complex set of gears for the hour, minute and sub-second hand going through the chronograph layer, we have a very decent amplitude indeed.