SEVERINA, Antoninianus Rome mint. Struck 275 AD. 

SEVERINA AVG, diademed bust right on crescent.
CONCORDIAE MILITVM, Concordia standing left, holding two standards. 

B in right field, mintmark XXIR
RIC V-1, 4; Cohen 7. 

With permission of Numismatica Ars Classica, Oct. 2014.