The Omega Seamaster Aqua Terra represents a fine mix between sports and elegance. It's refined yet robust -boasting a water resistance of 150 meters- and its signature elements include the dial inspired by the wooden decks of luxury sailboats, the twisted 'lyre' lugs, and a distinct hand set.The present model has a 43mm case that houses an Omega in-house co-axial movement with annual calendar complication.As reference 231.20.43.22.06.001, the Aqua Terra Annual Calendar features a case and bracelet done in a combination of red gold and stainless steel. The dial is brown/ grey.