Kythnos, Cyclades AE17, ca 200-100 BC. 

Laureate and draped bust of Apollo right; branch before head.
K-Y Q-N in two lines to left and right of lyre.

Pozzi 4521 (this coin); Lindgren II 1793; Hunter 1.

With permission of cngcoins.com, Mail Bid Sale 76, Lot 646, Sept. 2007.