A very rare moulded Qingbai rectangular washer, Northern  Song dynasty (960-1279). Estimate HK$400,000 – HK$600,000 ($51,867 - $77,801). Photo Christie's Image Ltd 2015

The square washer is moulded on four sides with flowers borne on scrolls, supported on four bracket feet, covered with a translucent crackled greyish-celadon glaze with the exception of the base exposing the white porcelain body. 4 1/2 in. (11.6 cm.) wide, box

Christie's. THE PAVILION SALE - CHINESE CERAMICS & WORKS OF ART, 6 October 2015, 22nd Floor