Three pairs of cufflinks, early 20th century, comprising: two pairs of onyx and diamond cufflinks,

Three pairs of cufflinks, early 20th century, comprising: two pairs of onyx and diamond cufflinks, each end of octagonal outline in polished onyx, centring on a circular-cut diamond, connected by chain links, mounted in gold and platinum, larger 1.3cm diameter each end, two fitted case, one stamped Collingwood; and a pair of cufflinks and three buttons, each of octagonal outline, set with mother of pearl, mounted in gold and platinum, 1.3cm diameter each, each stamped 18CT&PT, one button deficient, fitted case