It is possible that buckles like this one were made in Byzantine workshops and given to barbarians in an effort to persuade them to become Roman allies.
J. Pierpont Morgan, London and New York (until 1917)
Brown, Katharine R. Migration Art, A.D. 300-800. New York: The Metropolitan Museum of Art, 1995. no. 16, p. 23.
Brown, Katharine R., Dafydd Kidd, and Charles T. Little, ed. From Attila to Charlemagne: Arts of the Early Medieval Period in the Metropolitan Museum of Art. New York and New Haven: The Metropolitan Museum of Art, 2000. pp.106, 217, 341, fig. 10.4, 19.3.