Watch List notes:

Greek Italy. Uncertain Umbria or Etruria. Halved AE Cast Quadrans (?), 3rd century BC. Obv. Plain with rough excrescence.
Club missing for rilevant casting flaws (?). Rev. Pellet. Cf. Vecchi ICC 198; cf. HN Italy 53. AE. 22.37 g. 29.00 mm. R. Rare and interesting. Nice emeraldd green patina. VF.

Probably cutted to provide small change, just like the cast bronze ingots were usually cutted for payments of smaller amounts in the 3rd century BC.