In this blog post, I will go over the steps for an overhaul of an Omega Seamaster Cosmic.

The watch arrived to me in need of an overhaul and it also had a broken oscillating weight axel. After much searching, I found the axel and started on the repair.

This movement comes with a one piece case and a split stem. Luckily the split stem was still in good shape on this one which made the overhaul possible.

Picture of the movement before disassembly.

Very nice movement model #565 in overall great condition.

Oscillating weight axel replacement.

Broken axle on the right, new part on left
Underside of auto unit showing axel placement.
New axle shown from the top
Auto removed showing basic movement.
Barrel bridge removed showing sweep center pinion
Train wheels
Date Mechanism
Dial side showing date wheels ready to be cleaned
Underside of date bridge showing quick-set lever
Inside case
Outside of case back
Finished watch ready to wear

CHARLEY PHOTO OF THE WEEK: Don’t worry, Charley. There’s a long weekend coming up.