A virtually identical jar and cover in the Tokyo National Museum is illustrated in Oriental Ceramics, The World's Great Collections, vol. 1, Tokyo, no. 2. By the end of the 6th century, the molding of the leaf tips in high relief had been abandoned for an incised line, as can be seen on a jar in the Honolulu Academy of Arts illustrated by M. Medley, T'ang Pottery and Porcelain, London, 1981, p. 67, pl. 59. An example of this latter type of jar, along with its cover, was sold in these rooms, 16 September 1999, lot 273.
The result of Oxford Authentication Ltd. thermoluminescence test no. P101y87 is consistent with the dating of this lot.