Watch List notes:

SICILY. Syracuse. Hieron II, 275-215 BC. Trichalkon (Silver, 10.5 mm, 0.63 g, 7 h), 216-215. Head of Athena to left, wearing crested Corinthian helmet; border of dots. Rev. ΣΥΡΑΚΟ - ΣΙΩΝ above and below, ∴XIII (=chalkoi 3 ); below, monogram of ΑΦ. Buceti 1275 var. (same denomination and monogram, but different legend arrangement). CCO 322 (D3/R6, this coin illustrated). Very rare. Attractive, well-struck and lightly toned. Tiny chip on reverse edge, otherwise, nearly extremely fine.
From the "Collection sans Pareille" of Ancient Greek Fractions, ex M&M Numismatics (USA) I, 7 December 1997, 52 and Münzen und Medailen FPL 602, November-December 1996, 30.

Another curious coin! At a time when most states had phased out silver coins valued at less than a hemidrachm, here we have Syracuse producing trichalka in silver!