A Sotheby's employee displays a diamond ring weighing 11.71 caratage during a press call presenting jewels from the collection of Maria Callas, one of the world's most famous operatic sopranos, in Lugano, Switzerland, Wednesday, October 13, 2004. A group of jewellery from Callas' collection consisting of 11 pieces, most of which were given to her by her husband Giovanni Battista Meneghini during the 1950s, will be offered for sale by Sotheby's Geneva on November 17, 2004. (KEYSTONE/Karl Mathis)
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