A guan-type lingzhi-form brushwasher. Qing dynasty, Yongzheng period. 

shaped in the form of a large lingzhi fungus on a short gnarled stem, covered overall with a greyish-blue glaze thinning to brown at the edges and suffused with a subtle network of crackle, wood stand. Quantity: 2  - 25.5cm., 10in. Estimate 25,000-30,000 GBP

Sotheby's. Fine Chinese Ceramics and Works of Art. London | 09 Nov 2011 www.sothebys.com