1964, excavated by Robert H. Dyson Jr. on behalf of the Hasanlu Project sponsored by the University Museum of the University of Pennsylvania, the Archaeological Service of Iran, and The Metropolitan Museum of Art; acquired by the Museum in 1965, as a result of its financial contribution to the excavations.
Muscarella, Oscar W. 1980. The Catalogue of Ivories from Hasanlu, Iran. Hasanlu Special Studies II. University Museum Monograph 40. Philadelphia: The University Museum, University of Pennsylvania, no. 147, pp. 74-75.