Here’s an exception, and it’s this Omega La Magique. Gary from Wales opened the watch in an attempt to change the battery, and was quite surprised to have a couple of wheels and other bits in his hand.
So if you are ever tempted to open one of these yourself: remove the screws, keep the watch together, support the back on a little stand, and then take the front of the watch off, keeping the back on your little support.
This is what you get to see if you don’t do it right – wheels and bits everywhere 😉
With a bit of head scratching, I figure out where everything goes. In case you are interested, this is how the watch basically works:
Bottom left is the battery, which, with the help of an IC (the black rectangle with the silver oval in the middle), and quartz (the silver tube at the bottom) and a resistor (the bit above the quartz), drives a step motor at the top of the watch (the two coils with the gear).
Then, with the help of a couple of wheels, the minute disk is driven, and, with a 1:12 gear ratio, the hour disk.
The two round copper bits left and right of the gear train hold the glass disks in place. They are held in place by a little rubber seal (one of them on the left of the watch, one missing).
Unfortunately, even with a new battery, no luck. I hook up an oscilloscope to the quartz, and I get no signal. So the IC is shot, as current arrives where it should.
I can’t get hold of a new circuit board, so I’m afraid that’s it for this beautiful watch, until a donor movement comes along.