George Clooney wears an Omega De Ville Trésor Master Co-Axial watch in white gold during the ceremony of his wedding on 27 September, 2014 with Amal Alamuddin in Venice.
The gold watch with white dial and brown leather strap worn by George Clooney in the movie The Descendants is confirmed to be an Omega De Ville Prestige Small Seconds.
George Clooney, in the film Up in the Air, is wearing an Omega DeVille Hour Vision with steel case, steel dial and black leather strap, reference: 431.33.41.21.02.001.