This miniature Xenon Ware South Italian Greek sessile kantharos is slightly larger than most of these usually are.
This type of overpainted ware is known as Xenon ware; it is an Apulian version of the Attic Saint-Valentin Group of sessile kantharoi.
Intact other than a small V shaped chip in the rim as shown.
South Italian Greek Colonies, first half of the 4th century BC
Beazley, J. D., Etruscan Vase-Painting, Oxford, Clarendon Press, 1947, 218-221 ("Xenon Group").
Green, J. R., "The Xenon Group", The Art of South Italy: Vases from Magna Graecia, eds. M. E. Mayo and K. Hamma, Richmond, Virginia Museum of Fine Arts, 1982, 291-292.
Robinson, E. G. D., "Between Greek and Native: The Xenon Group", Greek Colonists and Native Populations: Proceedings of the First Australian Congress of Classical Archaeology, ed. J-P. Descdres, Oxford, Clarendon Press, 1990, 251-265.
Hayes, J. W., Greek and Italian Black-Gloss Wares and Related Wares in the Royal Ontario Museum: A Catalogue, Toronto, Royal Ontario Museum, 1984, 195 and 196 (larger examples).
Metzger, I. R. et al, Corpus Vasorum Antiquorum, Schweiz 5, Svizzera 5 (1979), Tafel 13, 4-5.
Pryce, F. N., Corpus Vasorum Antiquorum, Great Britain 10, British Museum 7 (1932), IV E, Plate 4, 2 a and b.
Rocco, A., Corpus Vasorum Antiquorum, Italia 24, Napoli 3 (undated), IV E, Tavola 45, 9 and 11.
R�ckert, B., Corpus Vasorum Antiquorum, Deutschland 69, T�bingen 7 (1997), Tafel 30, 1-2.
Wisseman, S. U., Corpus Vasorum Antiquorum, USA 24, Illinois 1 (1989), Plate 60, 2-3 (similar pattern on Plate 60, 3).