In the form of a crescent moon, set with rose-cut diamonds, Dutch hallmarks.
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Owned by Baroness Agnes Schimmelpenninick van der Ooye (1908 – 1991), who was a lady in waiting to Queen Wilhelmina of the Netherlands until her marriage to F.J van Beeck Calkoen in 1945, the Mayor of Ouderkerk aan den Ijssel and of Barn. Thence by decent.