Macedonia, Antigonus Gonatas; 277-239 BC. Tetradrachm, 17.04g. Mathesin, Museum Notes 26, 1981, p. 111. Obv: Macedonian shield; in center, horned head of Pan l. with pedum behind neck. Rx: BAΣIΛEΩΣ - ANTIΓONOY Athena Alkidemos advancing l., brandishing thunderbolt and holding shield with facing head of Pan (rather than the usual Medusa) at its center; to l. of Athena's legs, crested helmet; to r., MT monogram. . aEF/VF (750)