Lot 176. A 'Yaozhou' Celadon 'floral' bowl, Northern Song-Jin Dynasty (960-1234). Diameter 8 1/4  in., 20.8 cm. Estimate 18,000 — 24,000 USD. Lot sold 30,000 USD.Photo Sotheby's

of conical form with everted rim resting on a low knife-pared foot, the interior crisply molded with a central stylized flowerhead medallion set with the character yang encircled by an undulating leafy stem issuing three large blooms and three smaller blossoms, the exterior incised with petal-like radiating lines, the foot ring unglazed for firing. 

Note: It is rare to find bowls of this type with inscriptions.  A similar example bearing a similar yang mark was sold in these rooms 23rd March 2011, lot 557. A bowl of the same pattern, lacking the mark, excavated from the kiln site, is illustrated in Yaozhou Kiln, Xi'an, 1992, along with a ceramic mold used to make the 'chrysanthemum' pattern. 

Sotheby's. Important Chinese Works of Art, New York, 17 march 2015, 02:00 PM