Olynthus, Macedonia, Chalcidian League, AR tetrobol, 15mm, 2.34 g, ca. 389-380 BC,

Laureate head of Apollo left.
XALKIDEWN, kithara (lyre)

Sear 1425; Robinson & Clement Group H, 60; de Luynes 1552; SNG ANS 524; Hoover HGC 501.. 

Robinson and Clement dated their Group H c. 410-401 BC. 
Westermark, "Studies Rudi Thomsen", pp. 91-103, concluded 
that the Chalcidian League did not exist before the 
beginning of the 4th century and dated Group H to the 380s, 
the period of the League's greatest expansion.

With permission of cngcoins.com, auction 515, Lot 68, May 2022