Megalopolis, Arkaian League issue, AE18. Trichalkon, ca 363-350 BC. 4.04 g. 

Laureate head of Zeus left
AKR monogram, syrinx below, all within oak wreath.

BMC 75; BCD Peloponnesos (Megalopolis) 1514-1515. 
Very rare. 
Ex BCD Collection.
Estimate: $100

With permission of cngcoins.com, May 2009,