Corinth, AR Stater, 370-340 BC. 24 mm. 7.74 g. 

Pegasos flying right, Koppa below
Helmeted head of Athena left wearing Corinthian helmet with 
large neck-piece, dolphin left above, head of griffin or 
Ketos in lower right field.

Ravel 825; Calciati Pegasi 316

With permission of Baldwin's, Dmitry Markov and M&M 
Numismatics, The New York Sale XIV, Lot 98, Jan 2007
Later resold by CNG auction 94, Lot: 372