Tanagra, Boeotia, AR hemiobol, 8mm, 0.41 g. early to mid 4th century BC. 

Upper half of a Boeotian shield.
T-A to left and right of horse's head right.

BCD Boiotia 304. 

With permission of cngcoins.com auction 88, Lot 216, Sept. 2011.