The Quartuncia denomination
The quartuncia was the smallest denomination issued during the time of the Roman Republic.

These bronze coins had a value of 1/4 uncia and were minted in low numbers only between about 222 and 200 BC.

Quartuncia showed the head of Bellona, the goddess of war. The reverse bore the typical motif for Roman bronze coins, a prora, a ship's prow.
Quartuncia

(1) Rome | Anonymous 217-215 BC
Obverse: head of Roma right wearing crested Corinthian helmet
Reverse: prow of galley right ROMA
Ref: Crawford 38/8, SRCV I 624, Sydenham...