A Roman marble relief panel A rare pair of famille rose 'melon' teapots and covers Iron-red Qianlong seal marks, Late Qing Dynasty/ Republic Vacheron Constantin. An unique 18ct gold diamond ruby and emerald manual wind hunter pocket watch  "Mysterieuse", Circa 1988

High class diamonds and watches are in constant demand and sold particularly well in Hong Kong in May in a part of the world where top quality is highly prized. In a sale total for Fine Jewellery and Jadeite of HK$50m a sapphire and diamond ring at HK$6m stood out together with a Bulgari single stone diamond ring at HK$5,000,000. The Modern Wristwatch sale made over HK$14m with a unique 1988 Vacheron Constantin 18ct gold hunter pocket watch being sold for HK$1,800,000.

There were similar stories in London and New York. In London in April a pair of diamond earrings sold for £240,000 and a pair of Cartier clips for £230,000 while in New York's April sale – which was held by simulcast with Los Angeles and San Francisco – an important diamond solitaire ring made US$790,000.The Fine Clocks sale in London at the end of June, offered an astonishing discovery in an English ebony bracket clock attributed to the master clockmaker Ahasuerus Fromanteel. It had recently come to light in a European private collection where it had lain unrecognised until spotted by a Bonhams specialist on a house visit.

This was the equivalent, in the clock world, of stumbling across a lost da Vinci or an unknown piece of Chippendale and it sold for £690,000. In the same sale, a clock shown at the 1801 exhibition of French industrial products and bearing both Republican and Gregorian calendars, made £320,000. It too had been found in Europe, this time in the Netherlands.

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