A less detailed jade necklace closing device carved as a bird in flight excavated from the late Shang Tomb No. 3 at Qianzhangda, Tengzhou, Shandong province, is illustrated in The Complete Collection of Unearthed Jades in China - 4 - Shandong, Beijing, 2005, no. 113. See, also, the more similar example in the Sonnenschein Collection illustrated by A. Salmony, Archaic Chinese Jades, The Art Institute of Chicago, 1952, pl. XLIX (4).