The distinctive shape of this bowl, with small foot ring and wide, inturned mouth rim, is based on a Middle Eastern prototype common to both pottery and metal. For a Persian bronze bowl dating to the 12th-13th century, shown alongside a Longquan bowl of corresponding form, see M. Medley, Metalwork and Chinese Ceramics, London, 1972, p. 45, pls. 15a and b.
Similar Longquan bowls recovered from the Sinan wreck off the coast of Korea, are illustrated in the Special Exhibition of Cultural Relics Found off the Sinan Coast, National Museum of Korea, Seoul, 1977, col. pls. 107-9. A similar bowl with slightly rounder sides was unearthed in 1960 at the kiln site of Dayao from the late Southern Song stratum, and is now in the collection of the Zhejiang Provincial Museum. See Wenwu, 1963:1, pp. 27-35 and Zhongguo Longquan Qingci, Hangzhou, 1998, pl. 60. A closely related bowl is in the National Palace Museum, Taipei, and included in Illustrated Catalogue of Sung Dynasty Porcelain, Taipei, 1974, no. 20.