Cartier egg pendant

A 18 carat gold egg set with 30 brilliant cut diamonds (a little under a carat in total) in the shape of an ellipse, signed and numbered: Cartier, Paris, 179757, 1980 and a 18 carat gold chain, Cartier, Paris, with a master’s mark and numbered: GA, 564154, circa 1980.

Length chain: 49 cm.
egg: 3 x 1.5 cm.

HouseCartier, Paris

Please find me a jewel like this