I. Athlete, standing. Right leg crossed over left, toes touching ground. Right arm akimbo. Staff with cross piece at top of vertical in left hand. Youth faces toward his left. Two halteres on ground. A. Left to right, column without capital (or meta?); trainer holding out stick; two nude youths wrestling. On wall, a discus bag and a pair of halteres. B. Three nude youths. Left to right, standing, with looped rope; seated on ground; standing, with javelin.
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. 27
Bates, William N. "Five Red-figured Cylices." Transactions of the Department of Archaeology, Free Museum of Science and Art 2, no. 2. (1907): 133-154. See: pp. 140-144, no. 2, fig. 2-3, pl. 35