The Erwin Harris Collection, Miami, Florida, by 1995.
J. F. So and E. C. Bunker, Traders and Raiders on China's Northern Frontier, Washington D.C., Arthur M. Sackler Gallery, 1995, p. 116, no. 31 and p. 44, col. pl. 7.
J. F. So, 'Bronze Weapons, Harness and Personal Ornaments: Signs of Qin's Contacts with the Northwest', Orientations, November 1995, p. 39, fig.7. (left), where the author identifies the yoke ornament and another as of leopard shape.