Postby IreneBlack » Thu Dec 23, 2021 8:44 pm
I've looked for the answer to this for quite some time and inadvertently found the answer yesterday. I found it on page 248 of the book 'Cartier 1900-1939'. It is in the description of a clip brooch made by the Cartier Paris workshop in 1931: "MARKS Clip: edge of clip fitting engraved Cartier Paris Londres New York, MADE IN FRANCE and DEPOSE, with MECAN (for 'Mecanisme', indicating the use of base metal parts) inside the clip fitting". So there you have it!