There is another group of related Wanli-marked wucai pen-trays of the same shape but with a slight variation in the main motifs where they are moulded in relief and the 'dragon and phoenix' on the interior main compartment are replaced with a pair of dragons. These include an example exhibited by Yamanaka & Co., London, 1938, Exhibition of Chinese Ceramic Art, Bronze, Jade, etc., and sold at Sotheby's London, 11 June 1996, lot 36; a pen-tray from the Robert Chang collection, sold at Christie's Hong Kong, 31 October 2000, lot 828; its companion pen-tray was included in the exhibition, Ming and Ch'ing Porcelain from the Collection of the T. Y. Chao Family Foundation, Hong Kong Museum of Art, 1978, illustrated in the Catalogue, no. 42; and another in the Percival David Foundation exhibited in Ceramic Evolution in the Middle Ming Period, illustrated in the Catalogue, no. 22; and another from the Hirota Collection, now in the Tokyo National Museum, is illustrated in Oriental Ceramics, The World's Great Collections, Kodansha series, 1982, vol. 1, pl. 76. 

Wucai brush (pen) tray, Ming dynasty, Wanli mark and period, AD 1573–1620, Jingdezhen, Jiangxi province. Porcelain with underglaze cobalt-blue and overglaze wucai enamels, 29,6 cm Width. Sir Percival David Foundation of Chinese Art, PDF 748 © 2017 Trustees of the British Museum

Christie's. For Imperial Appreciation: Fine Chinese Ceramics from the Greenwald Collection, 1 December 2010, Hong Kong