Lot 3659. A rare ru-type washer, seal mark and period of Qianlong (1736-1795). Estimate 100,000 — 120,000 HKD. Lot sold 437,500 HK. Photo Sotheby's.

the compressed body rising from a tapered foot to a short mouthrim with a small 'U'-shaped dent, applied overall save for the unglazed footring with a creamy light greyish-blue glaze thinning to the mouthrim, the base with an underglaze-blue six-character seal mark; 11.3 cm, 4 3/8  in..  

Sotheby's, Important Chinese Art, Hong Kong, 05 oct. 2016