Lot 3130. A Jun blue-glazed bubble bowl, Northern Song-Jin dynasty (960-1234), 4 1/4 (10.9 cm.) diam., box. Estimate HKD 180,000 - HKD 250,000. Price realised HKD 225,000 © Christie's Images Ltd 2017

The bowl has rounded sides rising to a slightly incurved rim from the short, unglazed foot, and is covered with a glaze of sky-blue tone, thinning to mushroom on the rim. 

Christie's. The Imperial Sale / Important Chinese Ceramics and Works of Art, 31 May 2017, Convention Hall