The present vessel has a closely related bronze counterpart of very similar shape and design, excavated in Xi'an, Shaanxi province, attributed to the early Spring and Autumn period, bearing a longer inscription with the first two characters (maker's name) since effaced, reading XX wei furen xingxu yongzheng yongxing maisui yongshang ('XX made this xu for the wife to be used for ten thousand years'), formerly in the collection of Liu Tizhi and Rong Geng, published in Wu Zhenfeng, ed., Shangzhou qingtongqi mingwen ji tuxiang jicheng [Compendium of Inscriptions and Images of Bronzes from the Shang and Zhou Dynasties], Shanghai, 2012, vol. 12, no. 05590, where the author noted there is an extant bronze ding with the same inscription, also missing the first two characters.
Stone wares made in the form of archaic bronze ritual vessel, such as the present xu and cover, are extremely rare, although examples of this type have been excavated, providing evidence of the existence of stone ritual vessels in Bronze Age China. See a jade ding, excavated from a tomb in Luoyang, Henan province, dated mid-Spring and Autumn period, inscribed with a three-character inscription to the shoulder reading gong ci ding ('bestowed by the duke'), published in Wu Zhenfeng, op. cit., no. 19701. The same tomb also yielded a bronze ding and two bronze he bearing the same inscription, which suggests they were made as a set. A further late Shang dynasty white marble dou and a green jade gui, excavated from Fu Hao's tomb, Henan province, are illustrated in National Museum of China, ed., Zhongguo guojia bowuguan guancang wenwu yanjiu congshu. yuqi juan / Studies of the Collections of the National Museum of China: Jade, Shanghai, 2007, pls 32 and 33.