Erythrai, Ionia, AR Didrachm, ca 480 BC. 6.65 g.

Erythros on horseback galloping right.
Quadripartite incuse square. 

BMC 13; SNG Cop. 554; SNG von Aulock 1943; Boston MFA 1836 (this coin); SNG Lockett 2814; McClean 8140; Jameson 2269.

Used by permission of CNG, Triton VIII, lot 411, Jan 2005.
Ex Hess-Leu 31 (6-7 December 1966), lot 432; Boston MFA 1836.