Coin dated 1st century BC-second quarter? at Warren1998, pp. 358-359. J. Warren (Warren1984, pp. 21-22) suggests that the denomination of this type could have been quarter-obol or trichalkon.
Comment
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 Aineias 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.