J. Warren (pp. 21-22) dates the coin most likely to the ca. first quarter of 1st century BC but cannot rule out ca. 58-30 BC, and suggests that the denomination could have been quarter obol or trichalkon.
The shape of the secondary impression on reverse distinctly resembles the front of the prow on type AgoraXXVI 152, which is known to have been overstruck on several Sikyonian Aineas issues at Athens in ca. 25-22/21 BC (Warren1984, pp. 20-21), but in that case the overstriking of Co 1331 was drastically misplaced off the top of the flan.
“Co 1331 (Late Hellenistic trichalkon of Sikyon).” In Kenchreai Archaeological Archive, edited by J.L. Rife and S. Heath. The American Excavations at Kenchreai, 2013-2023. <http://kenchreai.org/ke/co1331>