The watch worn by the main character Peter Devereaux (Pierce Brosnan) in The November Man is a Lorus Chronograph 50m YM92-X156 Lorus RF847CX9 (thanks to comments below) with green strap. A rather unusual choice. The brand Lorus is not often seen in films and is not a maker of high end watches.
The model worn by Brosnan is currently very difficult, if not impossible, to find anywhere. There was one for sale on eBay, but that one was sold a while ago.