Continental Greece. Kings of Macedon. Antigonos II Gonatas (277-239 BC). AE Unit, Pella or Amphipolis mint, c. 270-239 BC. D/ Helmeted head of Athena right; on helmet, head right within circular incuse countermark. R/ Pan standing right, erecting trophy; in left field, B; monogram between legs. Cf. SNG Cop. 1209-1213. AE. g. 4.87 mm. 20.50 R. A rare and interesting countermarked example. Green brown patina, with reddish spots. VF.