Lot 539. Two russet-splashed black-glazed bowls, Northern Song – Jin dynasty, 13.9 and 10.1 cm, 5 1/2  and 4 in. Estimate 20,000 — 30,000 HKD. Lot sold 25,000 HKD. Photo: Sotheby's.

the first with gently rounded sides, decorated with cascading russet streaks; the second with straight sides, decorated with metallic russet spots 

Sotheby's. Chinese Art, Hong Kong, 01 Jun 2017