Severina Antoninianus, 3.13g; 23mm, 275 AD. Rome. 

Obv: SEVERINA AVG, diademed, draped bust right, on crescent
Rev: CONCORDIA AVGG, Severina, standing right, clasping hand 
of emperor standing left. 

Mintmark gamma XXIR. 

RIC V-1 Rome 3; Sear 11704.

With permission of Roma Numismatics, December, 2009