An 18K (750) gold hatpin with a double-sided design of a polychrome enamelled iris on a sunny sky background with plique-à-jour enamel. French work from the early 20th century. In its case with the form, Maison Chemin in Paris. Height of the motif : 3 cm approximately. Gross weight: 15.5 g (a gold hat pin is attached) A french Art Nouveau enameled hat pin