Gallienus (253-268 A.D.) -  AE Antoninianus - 19.64mm, 2.47g
Obverse - GALLIENVS AVG
Gallienus, his radiate head right
Reverse - ORIENS AVG.
Sol walking left, right hand raised, holding whip in left hand.
Minted in Mediolanum (Milan, Italy) in 264-265 A.D.

Reference:
Webb, P.H., "Roman Imperial Coinage", Volume 5, Part 1 (RIC), p174, nr 495 with bust K (under sole reign of Gallienus)
Sear, D.R., "Roman Coins and their Values" (RCV Millennium Edition), Vol. 3, p296, nr. 10296.
Cohen, H, "Descriptions Historique des Monnaies frappees sous l'Empire Romain" (C), Volume 5, p410, nr. 690.
Seaby, H.A. & Sear, D.R., "Roman Silver Coins" (RSC), Volume 4, p85, nr. 690.
Suarez, R., "Encyclopedia of Roman Imperial Coins II" (ERIC II),  p516, nr. 540 (B40, O10, R249, T265, M4)
Suarez, R., "Encyclopedia of Roman Imperial Coins II" (ERIC II-digital),  p435, nr. 540 (B40, O10, R249, T265, M4)
Van Meter, D., "Handbook of Roman Imperial Coins" (VM), p247, nr 182.
Kampmann, U., "Die Münzen der Römischen Kaiserzeit", 2nd. revised edition (Kampmann), p319, nr.90.130.2.

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