An early 20th century 18ct gold, onyx and diamond gentleman’s dress set, composed of a pair of cufflinks, four buttons and two studs, all set with an octagonal onyx panel, the cufflinks and buttons each centred with an old-cut diamond, the two studs with single-cut diamonds, all mounted in 18ct gold and edged in platinum, stamped ‘18ct & pt’, cased, diameter of cufflink and button panels 12mm. £400-600