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An 18k gold opal ring

Stylised foliate shank with raised shoulders and granulation decor. The smooth oval bezel set with an opal doublet (ca. 22.67 x 16.65 mm, rich iridescence). Hallmarks: Fineness 750, maker's mark "PHM". The edges of the opal doublet chipped. Bezel 2.4 x 1.8 cm. Ring size 53. Weight 17.93 g.
Peter und Marianne Heyden, Cologne, presumably 1950s.

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Lot 121 Dα

An 18k gold opal ring