Tyra, Thrace. Circa 280-270 BC. AE 19mm, 5.29 g. 

Helmeted head of Athena right, wearing crested helmet.
TYRA above bull butting left. 

Anokhin 27 (this coin); Zograph, Tyra 22. 
Good VF, dark brown/black patina on an irregular flan. 
Extremely rare.

with permission of cngcoins.com,
Triton XVI Sessions, January 2013.