Tranquillina, AE36 of Amisos, Pontos. 241-244 AD. 

CABINIA TPANKYLINA CAICBACTH, draped bust right.
Pallas standing left, wearing corinthian helmet, holding 
transverse spear and resting hand on shield. 

BMC 98.
Very rare. 

With permission of Roma Numismatics, July, 2008