Watch List notes:

KINGS of MACEDON. Philip III Arrhidaios. 323-317 BC. Æ Unit (18mm, 8.01 g, 12h). In the name of Alexander III. Uncertain mint in Macedon. Struck under Antipater or Polyperchon. Diademed head right / Horseman riding right; thunderbolt below. Price 371A var. (weight range). VF, dark green to black patina, minor roughness.

The flan is unusually thick and weighs about twice that of the normal Æ Unit.