Now regarded as a forgery, this seal from the Thisbe Treasure shows man stabbing a bull.
Bibliography
Evans, Arthur. 1925. ‘The Ring of Nestor’. A Glimpse into the Minoan After-World, and a Sepulchral Treasure of Gold Signet-Rings and Bead-Seals from Thisbê, Boeotia, pp. 7-8
Myres, John (ed.). 1936. British Archaeological Discoveries in Greece and Crete 1886-1936, p. 31