Movement looks to be in good condition.

If the movement looks familiar it’s probably because the Omega 320 is based on the CH27

I start taking apart the chronograph components.

I now start taking the base movement apart.

Here you can see the crown wheel that is situated underneath the train bridge.

Here you can see the gear train layout.

Setting/winding mechanism.

All the parts have been cleaned and are ready to be put back together.

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

The mainsprings I get from cousins have been a little tricky as the inner loop is too large. I dig out this from my collection and it fits perfectly.

Here you can see the setting/winding mechanics going back in the movement after I fitted the base movement.

After putting the base movement together and seeing it runs well  I start fitting the chronograph components.

Movement almost back together.

Before fitting the dial I like placing the movement into the case to see everything is working like it should.

The dial gets a new layer of varnish that will protect it from corrosion.

I have also applied new luminous compound to the dial and hands.

Top quality chronograph movement.

After the movement has settled, I’m happy with the performance!