Corinth, AR stater, ca 345-307 BC. 22 mm. 8.56 g. 

Pegasos flying left. koppa below.
Helmeted head of Athena left, armoured neck guard, A beneath neck, R and triton right behind head. 

Pegasi I 438; Ravel 1020. 

With permission of Münzen & Medaillen (DE) GmbH auction 12, Lot 70, April 2003.
Later resold at Nomos auction 11, Lot 94, Oct. 2015 then Leu Numismatik AG auction 11, Lot 801, Feb. 2020.