Corinth, AR trihemiobol, ca 450 BC. 11mm, 0.63g. 

Pegasos flying left, trident above, koppa below.
T-P-I-H around head of gorgoneion facing. 

BMC 105; BCD Corinth 47-48; SNG Cop 25; SNG Lockett 2207. 

With permission of Savoca Numismatik Auction 27 Silver, Lot 126, Nov. 2018.