Gallienus, AE As, Viminacium, AD 253-268, joint reign. 21 mm, 9.51 g. 

IMP GALLIENVS PF AVG, laureate, draped and cuirassed bust right.
GERMANICVS MAXIMVS, two German captives bound and seated at the foot of a trophy.

Goebl MIR 840; RIC -; Cohen -. 
Very rare.

With permission of Numismatica Ars Classica auction 98, Lot 1395, Dec. 2016.