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Aurelian AE Antoninianus. Unattributed mint, AD 274-275. 

IMP AVRELIANVS AVG, radiate, draped and cuirassed bust right. 
CONCORD MILIT, emperor standing right, holding sceptre,  clasping hands with Concordia, standing left.

Mintmark Gamma.

RIC V-1, 391 unattributed mint; Sear 11515.
Scarce.