The Omega caliber 8500 is an in-house automatic movement. The rotor winds in both directions to reduce winding time. Power reserve of 60 hours. Swiss made. The pictures below are from an Omega Seamaster Aqua Terra Golf Edition and a newer style Planet Ocean XL.
The 8500 equipped with Co-Axial Escapement for “greater precision, stability and durability” according to the Omega website.
