Paulsen's Borre Style type B copper alloy sword chape, 69 mm. Ukraine.
See: Charlotte Hedenstierna-Jonson. 2002. A group of Viking Age sword chapes reflecting the political geography of the time. Journal of Nordic Archaeological Science 13, pp. 103–112.
Paulsen, P. Schwertortbänder der Wikingerzeit, Stuttgart, 1953