During the years that followed the second World War, a customs regulation was temporarily introduced in France, forbidding the i mport of watch cases made of precious metals, to protect French craftmen working in this particular field. During this whole period, agents for Swiss Manufacturers in France received from Geneva only the watch movements and respective dials, while the watch cases themselves were produced in Paris. These watch cases were made either on the basis of those producted by the manufacturer, or as exclusive cases for watches intended solely for the French Market. All the watch cases of French production are marked with the eagle head, which is the official hallmark, applied on all jewelry and gold items, by the official body regulating precious metals, Service officiel du Contrdle des Melaux Precieux. Such watch cases do not therefore bear the Swiss hallmarks nor indeed the Master Marks.