Watch List notes:

The Triumvirs. Mark Antony. Autumn 32-spring 31 BC. PB Hub(?) for Legionary Denarius Counterfeiter's Mold (24.9mm, 10.59 g). Legionary issue. Praetorian galley right / Blank. Cf. Crawford 544 for obverse prototype. VF, dark gray patina, broken.

This artifact is most likely the positive hub used to make the incuse impression for a counterfeiter's mold, which would have been made from clay or terracotta.