De Castellane introduced a new plate that gave more focus to the season each piece was released.The plates became ovals, still bearing the classic CHANEL with the copyright and registered trademark signs now directly to the left and right, respectively.On a single link in the chain of each necklace, a small circular plate with the same stamp was folded in half over a link, producing a sort of semicircular tag.The plate was quite seamlessly integrated, often not even noticeable unless one were to examine the piece closely. The “Made in France” was removed and replaced by a copyright symbol and the date the piece was produced.In 1941, an American costume jewelry company, the Chanel Novelty Company, started producing costume jewelry with a script ‘Chanel’ stamped on each piece.
“Made in France” was also stamped in the lower half of this circle.
Around this time pieces were being produced with the same stamp with an additional three stars underneath the name CHANEL.
It’s unclear as to how it was decided which pieces would receive which stamp around this time.
This style of plate was on all Chanel costume jewelry from their 23.
Beginning in 1993, the plate was redesigned once more with increased specificity regarding the season a piece was released.