18k gold (750e) and platinum (850e) clip brooch, stylizing a centered shield with a closed sapphire cushion, in an openwork geometric decor, enhanced by ancient-cut diamonds, 3 of which are more important. Unscrewable brilliance. Sapphire weight: about 2 carats. Around 1930. Gross weight: 14 g. Dimensions: 4 x 3 cm.