A blue-glazed cong-form vase, Daoguang six-character mark and of the period (1821-1850). Photo Christie's Image Ltd 2014.

The square-form vase is sturdily potted, with a pair of elephant-head handles with rings applied to the sides. It is covered overall in an even, rich dark blue glaze. 11 ½ in. (29.3 cm.) high. Estimate £15,000 – £20,000 ($25,215 - $33,620)

Provenance: Sotheby's Paris, 9 June 2011, lot 195.

Notes: A Jiaqing mark and period (1796-1820) vase with the same form is in the National Palace Museum, Taipei, illustrated in Special Exhibition of Ch'ing Dynasty Monochrome Glazed Porcelain, 1981, no. 55. See a similar Daoguang mark and period vase sold at Sotheby's Hong Kong, 8 October 2008, lot 2522.

Christie's. FINE CHINESE CERAMICS AND WORKS OF ART, 13 May 2014, London, King Street - http://www.christies.com/