Watch List notes:

LESBOS, Unattributed Koinon mint. Mid 5th century BC. AR Hemiobol or Tetartemorion (7mm, 0.27 g). Head of African right / Quadripartite incuse square, diagonally-divided, with stippled quarters. Unpublished in the standard references. Lightly toned, porous. VF. Very rare.

From the Tiny Art Collection.