Decorated in blue under cover with two small dragons on the outside and two on the inside; in the centre of the base it bears the six-character mark in underglaze blue of Emperor Yongzheng.
Catalogue notes: See the pair sold by Sotheby's, "China / 5000 Years"; 29 June 2022, New York, lot. 89.
See also the very similar but doucai example sold by Christie's, live auction 15488, "Fine Chinese Ceramics and Works of Art"; 6 November 2018, London, lot. 172.