Gallienus (253-268 A.D.) -  AE Antoninianus - 19.06mm, 3.41g
Obverse - GALLIENVS AVG
Gallienus, his radiate head right
Reverse - FORTVNA RED
Fortuna standing left, holding rudder and cornucopiae.
Minted in Siscia (Sisak, Croatia) in 260-268 A.D.

Reference:
Webb, P.H., "Roman Imperial Coinage", Volume 5, Part 1 (RIC), p181, nr 572 with bust K (under sole reign of Gallienus)
Cohen, H, "Descriptions Historique des Monnaies frappees sous l'Empire Romain" (C), Volume 5, p372, nr. 265.
Seaby, H.A. & Sear, D.R., "Roman Silver Coins" (RSC), Volume 4, p71, nr. 265.
Suarez, R., "Encyclopedia of Roman Imperial Coins II" (ERIC II),  p515, nr. 472 (B40, O10, R104, T66, M7)
Suarez, R., "Encyclopedia of Roman Imperial Coins II" (ERIC II-digital),  p435, nr. 472 (B40, O10, R104, T66, M7)
Van Meter, D., "Handbook of Roman Imperial Coins" (VM), p245, nr 81.
Kampmann, U., "Die Münzen der Römischen Kaiserzeit", 2nd. revised edition (Kampmann), p90, nr.90.59.

Quality: obverse: Very Fine-, reverse: Fine
Rarity: C (Common)