Omega Seamaster Planet Ocean 600M Diver Co-Axial Titanium Watch - $8500, *New* Diamonds And the original crown screws

And the original crown screws down perfectly

3mm excluding the crown x 42mm long lug tip to tip

Movement markings: Patek Philippe Geneve

T2 = Upgraded (transformation)

this more desirable mechanical example is powered by the very well made ETA 2892-A2 based movement with gilded rotor

Omega Seamaster Planet Ocean 600M Diver Co-Axial Titanium Watch - $8500, *New* Diamonds And the original crown screwsAlthough the mechanical watchmaking industry has a history of progressing slowly over time, one invention carried it a giant leap, the co axial Escapement. Considered by many to be one of the most significant watch technology advancements in the last 250 years, the co axial escapement functions with little need for lubrication. Until 1999, these escapements could not be found on watches selling for less than $150,000. That all changed when Omega