Delicate platinum (850) and yellow gold (750) collar pin, the two openwork shuttle-shaped ends paved with old-cut and eight-eighths-cut diamonds in pearl-grain setting, and centered with three larger diamonds in pearl-close setting. Pin in yellow gold (750). Safety toggle and push-piece clasp system. Circa 1910/20. Gross weight: 8.8 g - Width: 10.2 cm. In a Joseph Chaumet case. Chaumet.