Lot 62 Dα

A diamond pin brooch

Silver and 14k red gold pin brooch with three old-cut diamonds (in total c. 7.57 ct) in removable prong settings. The central stone c. 2.95 - 3.05 ct (c. 9.96 x 9.84 x 4.82 mm, L/M, si), the left stone (pin clasp) c. 2.45 ct (c. 9.03 x 8.81 x 4.56 mm, L/M, vs2/si1), the right stone (hinge) c. 2.17 ct (c. 8.82 x 8.63 x 4.47 mm, L/M, vs2-si1, slight fluorescence). Hallmarked: "R.Koch". Presumably using older stones. L 3.7 cm. Weight 8.20 g.
Juwelier Robert Koch, Frankfurt, c. 1900 - 1920.