An 18k bi-colour gold and ruby kinetic ring

An 18k bi-colour gold and ruby kinetic ring Solid square shank with pierced cross design. The disc shaped bezel set with one fixed and one mobile white gold rod set with natural rubies, the latter twisting around the fixed rod via a concealed ball bearing mechanism with the wearer's movements. Hallmarks: Fineness 750, maker's mark "B" in a circle. Bezel diameter 30.1 cm. Ring size 61. Weight 39.6 g. Friedrich Becker, Duesseldorf, 1980s.

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Ø 30,1 cm · ringstorlek 19,4 mm (EU 61) · vikt 39,6 g