Interesting coin due to the fact that it was minted for Severina. Her coins appear in circulation relatively rarely.
Roman Imperial
Severina (270-275), Antoninianus 270-275, Siscia mint
Obverse: diademed bust on crescent right
SEVERINA AVG
Reverse: Concordia standing left, holding two standarts, V in right field, XXI in exergue
CONCORDIAE MILITVM
Diameter 23 mm, weight 3.66 g