Compare the very similar cloisonné enamel bell (Fig. 1) of smaller size (33.5 cm. high) illustrated in The Complete Collection of Treasures of the Palace Museum - 43 - Metal-bodied Enamel Ware, Beijing, 2002, p. 156, no. 148.
For a Spring and Autumn period bronze prototype see, J. So, Eastern Zhou Ritual Bronzes from the Arthur M. Sackler Collections, Washington, D.C., 1995, pp. 378-9, no. 78, which has the same lenticular shape with arched bottom rim, similarly arranged rows of bosses, taotie masks at the bottom and a shank with rounded collar, but positioned slightly lower. Unlike the archaistic bell, the earlier prototype has a lug at the base of the shank and is not flanked by decorative flanges.
Compare also, the cloisonné enamel archaistic pou, from the collection of Juan Jose Amezaga, with a similar color palette and design of taotie masks, sold in our Paris rooms, 13 June 2007, lot 25.