Islands off Attica, Aegina. Silver Tetartemorion (0.16 g), ca. 456/45-431 BC Sea turtle. Reverse: Monogram of TE ( = tetartemorion) within incuse square. Milbank -; HGC 6, -; Nomos 29, 761. Unpublished in any references, but see the cited example that is more or less equivalent to our coin, and that recently sold in Nomos 29, realizing $3500! Toned. Good Very Fine.