Large old-cut diamond solitaire ring, circa 1920 Platinum. Set in the centre with an old-cut solitaire of ca. 2.75 ct. (N/pi1) in a cushion cut, surrounded by corresponding diamonds totalling ca. 0.65 ct. (H/vs1-si1). Weight approx. 4.10 g. Expertise by the Gemmologisches Institut Hamburg. Provenance: from the Michahelles Collection, Hamburg, which has grown over generations. Ring set with an antique diamond solitaire approx. 2,75 ct. (N/pi1) and diamonds approx. 0,65 ct. (H/vs1-si1), in platinum. Examined by Gemologist Institute Hamburg.