A 'JIZHOU' PAPER-CUT TEA BOWL SOUTHERN SONG DYNASTY, 12TH-13TH CENTURY

the steep rounded sides of the body rising from a short tapering foot to a slightly incurved rim, the interior resist decorated with three floral medallions reserved in rich dark chocolate-brown against a variegated buff ground, the exterior irregularly splashed with a buff glaze on a dark chocolate-brown ground in imitation of tortoiseshell, the glaze falling short of the foot to reveal the light grey body 

Formerly in the A. Schoenlicht Collection (by repute).

For a very similar bowl, see R.Mowry, Hare's Fur, Tortoiseshell, and Partridge Feathers, Cambridge, 1995, Catalogue no.100, where the author notes that such bowls were made at the kilns at Yonghe, Jian.