Gallienus, billon antoninianus. Siscia mint. Sole reign.

GALLIENVS AVG, radiate head right.
SALVS AVG, Salus standing left by altar, holding 
patera and sceptre, feeding serpent rising from altar.

RIC V-1 (S), Siscia 581.
Rated common. 

AAH sale on ebay, ca. 1999.