Silver antoninianus, 21mm, 4.05gm, issued AD 250/251 Rome mint.
Obv: IMP C M Q TRAIANVS DECIVS AVG, Radiate, draped bust facing right.
Rev: PANNONIAE, The two Pannoniae with two standards.
References: Sear 9378, RIC 21b, RSC 86.
This coin fits the following collection focus(es): Provinces.