Several Junyao jardiniére of this shape and approximate size, with varying glaze colors, are illustrated in A Panorama of Ceramics in the National Palace Museum: Chün Ware, Taipei, 1999, including one with a similar 'moon white' color glaze, pp. 60-1, no. 13.
Based on extensive archaeological and scientific research in China, presented at symposia held in 2005 and 2006, the majority of scholars now conclude that these fine quality numbered Jun wares must date to the Yuan or early Ming dynasty, late 14th to early 15th century. Jun wares do not appear to have been mentioned in Chinese literature before the Ming dynasty, but are mentioned frequently by the latter part of the Ming dynasty. Interestingly, comparisons with ceramics from other kilns, including some excavated from the Imperial Ming kilns at Jingdezhen, suggest that these vessels may have been made for the court in the early Ming dynasty, which would account for the high proportion of extant examples being preserved in the Imperial collections.