Lot 257. A large 'Guan'-type brushwasher, Qianlong seal mark and period (1736-1795). Estimate 10,000 — 15,000 USD. Photo: Sotheby's.  

of quadrilobed form, the shallow sides gently flaring to an everted rim, all supported on four ruyi-head feet, covered overall in a rich pale blue-gray glaze suffused throughout with a network of widely spaced dark gray crackles, the base inscribed with a six-character seal mark in underglaze blue, fitted wood stand (2). Length 9 7/8  in, 30.8 cm

Provenance: Collection of A. L. Gump (1869-1947), San Francisco, California, 1920.
Collection of Marilyn Gump, San Francisco, California, 1970.
Collection of Charles Bromwell (1936-2005), California.

Sotheby's. Important Chinese Art, New York, 13 sept. 2016, 10:30 AM