'Cartier Trinity diamond & 18ct gold ring stamped Italian 750 marks, marked Cartier 1996 Cartier G16515. approx weight 8.8 grams, ring size G. Ex Sotheby's Australia', stamped Italian 750 marks, marked Cartier 1996 Cartier G16515. approx weight 8.8 grams, ring size G. Ex Sotheby's Australia