A mother-of-pearl dress set and a pair of enamel cufflinks

A mother-of-pearl dress set and a pair of enamel cufflinks
The dress set comprising a pair of cufflinks and two dress studs, each set with circular mother-of-pearl terminals millegrain-set to the centre with with an onyx, old brilliant and rose-cut diamond cluster; each cufflink composed of a circular plaque with white guilloché enamel and rose-cut diamond centre, to later torpedo-shaped terminals, Russian marks (3)