This coin was minted by Mark Antony (80-30 BCE) to pay his army during the war that culminated in the Battle of Actium. On the face is a picture of an oared warship, for Antony was relying heavily on Egypt’s fleet in this campaign. On the reverse are three signa. These coins have a low silver content, which probably reflects the difficulty of paying such a large number of troops.
Goldsworthy, Adrian; Essential Histories- Caesar’s Civil War 49-44 BC. Great Britain- Osprey Publishing, 2002.