Share 'Tortoise and Oyster for Tang'

On April 8 in Hong Kong, Sotheby's will sell a special object, which has spent the centuries without yielding to the ravages of time and is an invaluable testimony (culturally speaking) of ancient luxury in the Tang dynasty. Financially, however, we can estimate: Sotheby's hopes it in excess of 40 MHK $. It is a large octagonal box with its cover, in tortoise-shell inlaid with mother of pearl. T…