Gallienus (253-268 A.D.) -  AE Antoninianus - 16.93mm, 2.15gr
Obverse - GALLIENVS AVG
Gallienus, his radiate head right
Reverse - ORIENS AVG, Z in field.
Sol walking left, right hand raised,
holding whip in left hand.
Minted in Rome between 264 and 266 A.D.
Reference:
Webb, P.H., "Roman Imperial Coinage", Volume 5, Part 1 (RIC), p152, nr 249 (under sole reign of Gallienus)
Sear, D.R., "Roman Coins and their Values" (RCV Millennium Edition), Vol. 3, p296, nr. 10297
Cohen, H, "Descriptions Historique des Monnaies frappees sous l'Empire Romain" (C), Volume 5, p410, nr. 699
Seaby, H.A. & Sear, D.R., "Roman Silver Coins" (RSC), Volume 4, p86, nr. 699a.
Van Meter, D., "Handbook of Roman Imperial Coins", p247, nr 183
Suarez, R., "Encyclopedia of Roman Imperial Coins" (ERIC),  p300, nr. 50 corrected, (B23, O09, R209, T191, M5)
Quality: obverse: Fine, reverse: Good-