The early Weatherby rifles made on FN and Sako M98 actions were assembled in California. They were not called Mark V, that is the name given to the fat bolt 9-lug actions. As Jim said, those have been made in several places.The early ones were made with Mauser actions
I got hard up for money about a year ago and sold my U.S made Mark V Deluxe in .257 WM for 500.