Alexander III, AV stater. Susa mint. Struck 325-320 BC. 19mm, 8.59 g. 

Helmeted head of Athena right, with helmet decorated with a bird flying right (variably called a duck, a dove or an eagle).
BASILEWS ALEXANDROY, Nike standing left, holding wreath and stylis. IAI monogram over B beneath wing tip in lower left field, Koppa M monogram in lower right field. 

Price 3826A; SNG Berry 184.

With permission of Roma Numismatics auction XIII, Lot 187, March 2017.