It was also during this period that Cartier began adding its own reference numbers to the watches it sold, usually by stamping a four-digit code on the underside of a lug.
It is estimated that the watch and jewelry sector uses over 50% of world's annual gold production over 2,000 tons , but in most cases the watch companies are not able to or are unwilling to demonstrate where their raw materials come from and if the material suppliers use sourcing technologies.
Founded by Louis-François Cartier in in 1847, the company remained under family control until 1964.
In 1907, Cartier signed a contract with Edmond Jaeger, who agreed to exclusively supply the movements for Cartier watches.
In the early 1920s, Cartier formed a with Edward Jaeger of to produce movements solely for Cartier.
A prestigious Parisian Maison opens around the world, now present in 60 countries and over 200 boutiques.