Kolophon, Ionia, AE, 4th-3rd century BC. Magistrate Alkidemos. 5.88 g.

Obv: Youthful head of Apollo right, hair bound in taenia, upright
jewel or horn above forehead.
Rev. AL-KI-DH-MOS around linear square within which is a lyre, KO above lyre.

Magistrate unlisted in Milne; BMC; Mionnet; SNG Cop; SNG ANS etc.

Another sold in Münzen & Medaillen GmbH, Auction 17 in 2005, lot 850. 

Very scarce.
  	
Used with permission. Münzen & Medaillen GmbH (DE) Auction 21, 2007, lot 626. Sold for 260 Euros (ca. $349)