Corinth, AR Diobol. 0.93 g. 

Horse's head right or head of Pegasos right.
Large delta within incuse square.

Weber 3672 (this coin).
Ex Naville Ars Classica, Auktion V (18. Juni 1923, Luzern), lot 2063.

With permission of Numismatik Lanz, Auction 105, lot 36