Gallienus (253-268 A.D.) -  AE Antoninianus - 20.06mm, 2.21gr
Obverse - IMP GALLIENVS PF AVG GERM
Gallienus, his radiate and cuirassed bust right
Reverse - VIRTVS AVGG
Soldier (or Virtus, Mars) standing right, holding spear and leaning on shield.
Gallienus
Minted in Rome in 257 or 258 A.D., during his joint reign with Valerian I.
Reference:
Webb, P.H., "Roman Imperial Coinage", Volume 5, Part 1 (RIC), p83, nr. 183, (under Gallienus joint reign)
Sear, D.R., "Roman Coins and their Values" (RCV Millennium Edition), Vol. 3, p305, nr. 10410 var.
Cohen, H, "Descriptions Historique des Monnaies frappees sous l'Empire Romain" (C), Volume 5, p464, nr. 1276 var.
Seaby, H.A., "Roman Silver Coins" (RSC), Volume 4, p108, nr. 1276a.
Van Meter, David, "Handbook of Roman Imperial Coins", p250, nr 340 var Ol/7.
Suarez, R., "Encyclopedia of Roman Imperial Coins" (ERIC),  unlisted, (B31, O32, R335, T233, M5)
Quality: Fine+