platinum ring with diamond

A wide platinum ring, the upper part is rectangular and tapers off in steps with a brilliant-cut diamond (app. 1.3 carats, D-E, Vs) flush set, with 6 baguette diamonds (each app. 0.15 ct E-F, Vvs and app. 2.2 ct in total HRD report no. J250000073628)) flush set in a geometric pattern on each side in the lower sections, signed: Boucheron, France, circa 1930.

weight: 11.2 g
ring size: 16.5 / 6 US
width: 8 mm