Trajan Decius (249-251 A.D.) -  AR Antoninianus - 21.36mm, 3.29gr
Obverse - IMP C M Q TRAIANVS DECIVS AVG
Trajan Decius, his radiate, draped and cuirassed bust right
Reverse - PANNONIAE.
The two Pannoniae, veiled, standing side by side, their heads turned
away from one another, each raising right hand, the one on the right
holding standard, the other with standard beside her to left.

Minted in Rome 250 or 251 A.D.
Reference:
Mattingley, Sydenham, & Sutherland, "Roman Imperial Coinage", Volume 4, Part 3 (RIC), p122, nr. 21b (plate 10, nr.14)
Sear, D.R., "Roman Coins and their Values" (RCV Millennium Edition), Vol. 3, p199, nr. 9378
Sear, D.R., "Roman Coins and their Values" (RCV 4th Revised Edition), p247, nr. 2699
Cohen, H, "Descriptions Historique des Monnaies frappees sous l'Empire Romain" (C), Volume 5, p194, nr. 86
Seaby, H.A. & Sear, D.R., "Roman Silver Coins" (RSC), Volume 4, p26, nr. 86
Van Meter, D., "Handbook of Roman Imperial Coins", p232, nr 16/1
Suarez, R., "Encyclopedia of Roman Imperial Coins" (ERIC),  p267, nr 14  (B5, O2, R17, T18, M3)
Quality: Obverse: Very Fine / Reverse: about Very Fine