Only one other example appears to have been published, sold in Hong Kong, 26 October 1993, lot 189.
An example decorated in doucai enamels from the Chang Foundation is illustrated by Spencer in Selected Chinese Ceramics from Han to Qing, p. 358, col. pl. 160.
A Qianlong-marked flask of this rare shape carved with archaistic dragons and covered in a celadon-glaze from the J.M. Hu Family Collection was included in Christie's exhibition of Important Chinese Ceramics from the Robert Chang Collection, London, 1993, Catalogue, no. 71. An example of the shape under a teadust glaze from the J.E. Hotung Collection was included in the Min Chu Society Silver Jubilee Exhibition, An Anthology of Chinese Art, Catalogue, no. 188, while a pair of Yongzheng-marked examples under a teadust glaze are illustrated in Chinese Ceramics in the Idemitsu Collection, fig. 961.
Compare also the underglaze-blue and copper-red decorated Yongzheng version with a rounded rather than a flat base illustrated in Qing Imperial Porcelain, col. pl. 48.