Trieros, Thrace, AR Hemiobol 8 mm, 0.4 g. ca 450-420 BC. 

Forepart of horse right.
T-R-H-I in the four corners of a quadripartite incuse square. 

BMC 1-2; SNG Cop 821; Imhoof "TRIH", 5.

With permission of Numismatik Naumann auction 57, Lot 72, Sept. 2017.