Roman Imperial Coin – Bronze Antoninianus of Diocletian
Obv: IMP CC VAL DIOCLETIANVS AVG, radiate and draped bust right.
Rev: CONCORDIA MILITVM dot, Emperor standing right, holding parazonium, receiving Victory from Jupiter standing left, holding sceptre, officina letter B in lower centre. Mintmark XXI dot.
291 – 292 AD. · Cyzicus Mint · RIC V 306, B
4.4g · 20.8mm