The Triens denomination
The triens (plural trientes) was an Ancient Roman bronze coin produced during the Roman Republic valued at one-third of an as (4 unciae).

The most common design for the triens featured the bust of Minerva and four pellets (indicating four unciae) on the obverse and the prow of a galley on the reverse. It was not a common denomination and was last struck c. 89 BC.
Triens
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An AE Triens struck After 211 BC in Rome
Obverse: Helmeted head of Minerva right. Four pellets above.

Reverse: Prow right, ROMA above, four pellets below.

Diameter: 25 mm
Die Orientation: -
Weight: 13.97 g
No notes for this coin
Crawford 56/4, RBW 206.
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An AE Triens struck 149 (148)BC in Rome
Obverse: head of Minerva right wearing crested helmet; ●●●●

Reverse: prow of galley right; L·SE(MP) / ●●●● / ROMA

Diameter: -
Die Orientation: -
Weight: 6.6 g
ex Andrew McCabe
Crawford 216/4
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An AE Triens struck 208 BC in Etruria
Obverse: head of Minerva right wearing crested helmet; ●●●●

Reverse: prow of galley right; ROMA / ●●●●

Diameter: -
Die Orientation: -
Weight: 10.1 g
No notes for this coin
McCabe E1.Tr.1 (related to Crawford 106)