I) cup-bearer. Naked youth advancing to left toward column krater, oinochoe in right hand, kylix in left. Border of maeander. A) Centauromachy. Centaur in center with uprooted tree in hand. To right and left a naked soldier. B) Combat. Soldier falling in center. To left, an archer; to right a soldier with sword and spear. Letters in field on I and A and B. Bloesch attributed the cup to Euphronios as potter.
The Perseus Project. http://www.perseus.tufts.edu/hopper/artifactBrowser?object=Vase&field=Collection&value=University+Museum%2C+University+of+Pennsylvania.
White, Donald J., Keith R. DeVries, David G. Romano, Irene B. Romano, and Yelena Stolyarik. The Ancient Greek World:The Rodney S. Young Gallery. Philadelphia: University of Pennsylvania Museum of Archaeology and Anthropology, 1995. See: p. 22