405-400 BC. Time of Dionysius I. 

Obv. SYRA, head of the river-god Assinaros left, grain of 
corn behind head. 
Rev: SYRAKOYSIWN, free horse prancing right.

SNG ANS 341; Boston 436. Weber 1610; Hoover 1281; Sear 951 var (symbol). 

With permission of TimeLine Auctions (www.timelineauctions.com), Sep, 2013