Watch List notes:

SICILY. Messana (as Zankle). Circa 525-494 BC. Litra (Silver, 12 mm, 0.81 g, 10 h). DΑΝΚΛΕ Dolphin swimming to left within the crescent-shaped harbour of Zankle; border of dots. Rev. Nine-part incuse divided into equal squares, some raised, some lowered and some diagonally divided; at the centre, scallop shell. Buceti 4. Gielow 77. Sharply struck and attractively toned. Extremely fine.
From the "Collection sans Pareille" of Ancient Greek Fractions, ex Münzen & Medaillen FPL 395, November/December 1977, 8.

The city of Messina was first named Zankle because of its sickle-shaped harbor (το Ζάγκλον = sickle).