Billion Antoninian with beautiful silver plating on the entire surface of the obverse and reverse.
Roman Imperial
Gallienus (253-268), Antoninianus 253, Rome mint
Obverse: radiate head right
GALLIENVS AVG
Reverse: Indulgentia seated left, holding olive branch and transverse sceptre, letter P in exerque
INDVLGENT AVG
Weight 3.98 g