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It displays a continuous landscape scene of ladies and gentlemen at leisure attended by young boys dressed as putti.

Measuring 5in (12cm) across, both the base and the cover are inscribed in black enamel with an eight-character Jesuit mark.

Using early enamel colours, it probably dates to before 1735, and would probably have been made for one of the Jesuit missionaries at court.

Part of the Asian Art sale at Bonhams Knightsbridge on May 9-10, it is being sold without reserve and given an estimate of £800-1200.