Gallienus, AE denarius, 19mm, 1,88g. 254 AD, Viminacium. 

IMP GALLIENVS P AVG, laureate, cuirassed bust right.
VIRTVS AVGG, Mars (or Gallienus) in military dress, standing
left, right foot on helmet or globe, holding globe and
spear.

RIC -. C. -. H. -. Goebl 437 var (obv. legend); Doyen, Die 
stilistische Entwicklung der Münzikonographie unter den Kaisern 
Valerian I. und Gallienus (253-268 n. Chr.), II.: Die Münzstätte 
Viminacium, GN 107 (1985), S. 109, 19 (this coin). 

Very rare.

Contributed by Dr. Hubert Lanz, auction November 2000, 
Added July 2011.