Jean Muller: A ‘Damoiselle D‘ Rosa ring, the 18ct white gold ring centred with an Akoya white cultured pearl edged by brilliant-cut diamonds within a twin row loop diamond set petal border, to tapering polished shank, the inner shank stamped ‘53 D A10’, stamped with maker’s mark and French eagle’s head guarantee mark, ring size M (leading edge). £400-£600