Pergamon, Mysia, 17 mm, 2.24 g, late 3rd century BC.

Obv: Head of Athena right wearing close fitting Corinthian helmet 
Rev: AQHNAS NIKHFOROY to right and left of owl standing facing, 
wings closed; PE monogram of Pergamon mint (looks a little like 
PRE) below, all within olive-wreath. 

BMC 15, SGC 3965; SNG Cop 381; SNG Paris 1930-1937.
Rare.

According to "Athena in the Classical World", the monogram 
shows that Pergamon was commissioned by the sanctuary to 
strike these coins to finance the Nikephoria festival. 
The first of these festivals took place in 283 BC, 
commissioned by a member of the Attalid monarchy, to 
celebrate Athena specifically as a bringer of victory.

With permission of Leu Numismatik AG Web Auction 5, Lot 229, Sept. 2018.
Starting Price: 25 CHF.