A very similar Longquan celadon bowl is illustrated by R. Krahl, Chinese Ceramics from the Meiyintang Collection, vol. 3 (II), London, 2006, p. 583, no. 1572. The barbed form appears to be based on a prototype in silver, such as the silver-gilt bowl illustrated in Zhongguo wenwu jinghua doquan; Jin yin yu shi juan (Complete masterpieces of Chinese cultural relics; Gold, silver, jade and stone), Hong Kong, 1994, p. 139, no. 146, which was recovered from a Song dynasty hoard at Pingqiao, Liyang, in Jiangsu province.