Movement looks to be in good condition.

Nice amount of gunk.

You can see the setting/winding mechanism.

I start taken apart the chronograph layer.

Movement cleaned and ready to be put back together.

I fit a new mainspring.

I fit the cap jewels and see that the balance moves freely.

Here you can see the gear train layout.

Base movement almost back together.

Movement ready for dial and hands.

I put the movement back into the case.

Watch is running like it should.

The minute recorder spring broke and a new one is readily available as the Omega 321 is based on CH27.

Movement completely back together and looking great.

The dial cleaned up pretty nice. It’s a rather unusual French market Fab Suisse dial.