Several examples of hexagonal armchairs have been published. See a pair of early 18th century examples illustrated by R.H. Ellsworth et. al., in Chinese Furniture: One Hundred Examples from the Mimi and Raymond Hung Collection, New York, 1996, pp. 88-9, no 24. See, also, the hexagonal armchair with tall back and curved, three-part splat, illustrated by Wang Shixiang et. al., Connoisseurship of Chinese Furniture: Ming and Early Qing Dynasties, vol. II, Hong Kong, 1990, p. 51, no. A80.
A related example in tielimu, although with crestrails framing standing posts and a small centered splat, is illustrated by Tian Jiaqing et. al., in Classic Chinese Furniture of the Qing Dynasty, Hong Kong, 1996, p. 97, no. 29, where the author mentions that the armchair is in the form of a five-paneled screen.