A rare pair of gilt-bronze mask and ring handles, Northern Wei dynasty | 北魏 銅鎏金透空鋪首活環一對

See a closely related pair of gilt-bronze masks, excavated from a Northern Wei tomb at Guyuan county, Ningxia province, illustrated in Guyuan County Cultural Relic Institution, 'Ningxia guyuan beiweimu qingli jianbao [A brief report on the excavation of the Northern Wei tomb at Guyuan, Ningxia]', Wenwu, no. 6, Beijing, 1984, p. 52, fig. 19.