Siphnos, Cycladen, AE17, 3.72 g. Late 4th century BC. 

Female head right. 
SI-F across lower fields, eagle front, head left, wings spread, serpent in beak. 

SNG Cop 748; Pozzi (Boutin) 4588; Hoover HGC 706; Mionnet II, 125 ("dove").

With permission of Solidus Numismatik auction 9, Lot 210, Oct. 2016.
Starting Price: 150 Euro.