Russell Crowe wears an Omega Speedmaster Professional in the movie State of Play. Crowe, who plays a journalist, wears the 50th Anniversary model, which features the golden Speedmaster 50th Anniversary 1957 emblem (patch) on the dial. The watch in the film has a black leather strap.

This Omega model was a limited edition, so check eBay or vintage watch dealers to find this watch.

Thanks to Sergio for the ID