Cf. For similar buckles:
Musée du Petit Palais Exhibition, "The Art of Cartier", Paris-Musées, Paris, 1989, page 142, plate 312
Sylvie Raulet, "Bijoux Art Déco", Editions du Regard, Paris, 1984, page 127
Judy Rudoe, "Cartier 1900-1939", Harry N. Abrams Inc., New York, 1997, page 217, plate 136
This turquoise and onyx buckle is most likely one of four executed for Cartier, Paris in 1922. Bearing the jeweller's mark H D with a flower to the centre, it was made by the Parisian atelier Droguet who was one of the house's principal manufacturers of platinum jewellery set with gemstones in the first quarter of the 20th Century.