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An 18k gold aquamarine brooch

Raised lancet motif set with an elongated aquamarine (ca. 24.91 x 8.35 mm). Hallmarks: Fineness 750, maker's mark "PHM" (conjoined), Cologne guild mark. L 8.0 cm. Width 2.4 cm. Weight 26.40 g.
Peter und Marianne Heyden, Cologne, presumably 1950s.

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Lot 117 Dα

An 18k gold aquamarine brooch