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A 21k gold opal ring

A moulded white and yellow gold band set with an opal cabochon (diameter ca. 9.4 mm). Stamped fineness 900. Bezel: Diameter 1.4 cm. Weight 9.0 g.
Circle of the Kölner Werkstätten, 1960s.

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Lot 141 Dα

A 21k gold opal ring