An identical example is in the Palace Museum Collection, Beijing, illustrated in Zhongguo Meishu Fenlei Quanji: Zhongguo Jiyin Boli Falangqi Quanji, Vol. 6, p. 140, no. 215 (see fig. 1).
The combination of butterflies and gourds in the band to the exterior is a pun on the wish for progeny, the Chinese words for gourds, gua and butterflies, die, being homonyms for part of the phrase Guadie mianmian, 'May there be ceaseless generations of sons and grandsons'.