6 janvier 2017
Formely in the collection of the late Countess Mona Bismarck. Very Fine emerald and diamond ring, circa 1910
Formely in the collection of the late Countess Mona Bismarck. Very Fine 9.50 carats Colombian emerald and diamond ring, circa 1910. Estimate 245,000 — 300,000 CHF. Sold 289,000 CHF at Sotheby's Geneva, 14 Nov 2007, lot 350. Photo Sotheby's The step-cut...