Obverse, Herakles and the Erymanthian boar Reverse, three horsemen
It is worth noting that the youths on the reverse are nude. Since they are armed with spears, they appear to be setting out for a hunt. This scene contrasts with the depiction on the obverse where Herakles is returning to King Eurystheus with the Erymanthian boar.
The Art Gallery of Toronto. 1948. The Classical Contribution to Western Civilization: A Loan Exhibition Organized and Lent by the Metropolitan Museum of Art, New York, to the Art Gallery of Toronto. p. 26, Toronto: Rous & Mann.
Beazley, John D. 1956. Attic Black-figure Vase-painters. p. 282, no. 1, Oxford: Clarendon Press.
Lexicon Iconographicum Mythologiae Classicae (LIMC). 1990. Vol. 5: Herakles-Kenchrias. "Herakles," p. 45; "Iolaos," p. 690, no. 31, pl. 461, Zürich: Artemis Verlag.