The exterior of these covered bowls is decorated with a particularly delicate version of a very popular motif - complex floral scrolls against a rich yellow ground. Dense floral scrolls on yellow grounds can be seen on several metal-bodied enamelled vessels in the Chinese Palace collections. They cover a Qianlong kang-table in the Palace Museum, Beijing (illustrated in The Complete Collection of Treasures of the Palace Museum -43 - Metal-bodied Enamel Ware, Commercial Press, Hong Kong, 2002, p. 239, no. 226) and several pieces in the National Palace Museum, including a Qianlong-marked double vase (illustrated in Enamel Ware in the Ming and Ch'ing Dynasties, National Palace Museum, Taipei, 1999, p. 239, no. 124), and a Qianlong marked bowl stand and covered bowl (illustrated ibid., p. 240-1, no. 125).
For a very comparable example see the pair of covered bowls from the Alfred Morrison collection, Fonthill House, sold in our London Rooms, 9 November 2004, lot 18.