Note: extremely rare and desirable minting error, much, much rarer than e.g. obverse brockages (themselves also rare and desirable).
Obverse: IMP AVRELIANVS AVG
Reverse: CONCORDIA MILITVM
BUST TYPE: B = Radiate, cuirassed bust right
FIELD / EXERGUE MARKS:
MINT: SISCIA
WEIGHT: 3.29 g
Provenance: ex G.J.R. Ankoné collection