with deeply rounded sides rising to a slightly incurved rim, the interior with three papercut lozenges in brown reserved on a mottled mushroom-brown ground, the exterior applied with a 'tortoiseshell' glaze stopping unevenly above the foot to reveal the pale buff body.

Provenance: Collection of T.Y. Chao (1911-1999). 
Sotheby's Hong Kong, 18th November 1986, lot 14. 

Sotheby's. Important Chinese Art, New York, 12 sept. 2018, 10:30 AM