Interesting coin minted for Severina, Aurelian's wife.
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, TXXI in exergue
CONCORDIAE MILITVM
Diameter 22 mm, weight 3.46 g