was in fact a mule; in other words, a mistake occurred in the process of overstriking the original coin, and it was accidentally issued with both king's standards. References Sources The Shape of Ancient Thought. Comparative studies in Greek and Indian Philosophies by Thomas McEvilley (Allworth Press and the School of Visual Arts, 2002) Buddhism in Central Asia by B. N. Puri (Motilal Banarsidass, January 1, 2000) The Greeks in Bactria and India, W. W. Tarn, Cambridge University Press. The Indo-Greeks, A. K. Narain, B.R Publications The Decline of the Indo-Greeks, R. C. Senior & D. MacDonald, the Hellenistic Numismatic Society External links Coins of Antialcidas More coins of Antialcidas Catalog of the coins of Antialcidas Indo-Greek kings 1st-century BC rulers in Asia 2nd-century BC rulers in Asia