Something very exciting today – an Omega Chronostop. This is the driver’s version, which means that the crown and pusher are on the left side of the case, and so is 12 o’clock. The watch is meant to be worn on the inside of the wrist, so it can be read when you have your hands on the steering wheel, so the 12 o’clock position makes sense. Neil, who is actually Philip’s father, sent this lovely watch in, as something slips when you try to wind the watch, and it needs a service.Looks like Omega wanted to be really trendy here, and was trying to capture a market outside the usual customer range. I have the vision of a TR6 driver with flies between his teeth, gripping the steering wheel madly whilst checking the time on his Chronostop 😉
It’s not a proper chronograph, and the single pusher just starts the central second hand. If you press the pusher again and keep it pressed, you can read the seconds elapsed. Once you release it, it goes back to 0. No indication of the minutes passed. I guess this rather enchanting uselessness makes the watch even more desirable! Nevertheless, a fairly complex movement lurks under the case back…
Quite complex, considering what the watch actually does!
This inverted pie-pan dial is simply gorgeous. Makes you hear a car revving up!
The calibre 865 came without a date dial, so the bottom plate is quite simple.
You can see that there is quite a bit of dirt, and now it’s time to take the top plate apart.
Making my way through the chronograph layer.
There is quite a bit of rust and dirt, and I will carefully remove as much of that as possible without taking too much material off.
The gear train, and more dirt and rust on the winding pinion and clutch wheel.
And here is the culprit. The barrel arbor is worn, and the mainspring slips around it.Everything goes into the cleaning machine.
The new parts have arrived – barrel arbor, crystal and mainspring.
I start off by putting the mainspring into the barrel.
I’ve cleaned the rust off the crown wheel, but it’s quite deep, and I don’t want to take off too much material.
The bottom plate components got a good clean as well.
The base movement is back together and ticking – now it’s time for the chronograph layer.
With a half-wound mainspring, this is looking good.
The chronograph layer is back together, and I can adjust the depthing.
The new crystal needs pressing into the case.
And the dial and hands go back on.
The movement cased.
The old gasket has solidified.
New gasket in place.