Corinth AR Stater, 22 mm. ca 345-307, 8.45 g. 

Pegasus flying left, Koppa below.
Head of Athena left, wearing Corinthian helmet, N and triskeles. 
Ravel 1065; Calciati 383.

With permission of Numismatica Ars Classica auction 84, Lot 1516, May 2015.
Estimate: 600 CHF.