Compare a set of Western Zhou bronze bells of similar form and bow-string decoration, from Shaanxi province, and dated to the middle Western Zhou period, illustrated in Shaanxi Chutu Shang Zhou Qingtongqi, vol. II, 1980, no. 75. The same set is illustrated by Minao Hayashi in his compendium, A Study of Shang and Zhou Bronzes, vol. 1, Tokyo, 1984, pl. 392.