Omega gents seamaster aqua terra 150m co axial gmt 43mm watch the dramatic and easily recognisable dial design of the omega seamaster aqua terra movement caliber omega 8605 self winding movement with co axial escapement for greater precision stability and durability gmt with time zone function silicon balance spring on free sprung balance 2 barrels mounted in series automatic winding in both directions to reduce winding time rhodium plated balance bridge and oscillating mass luxury f