Gallienus, 253-268. Antoninianus (Bronze, 22 mm, 3.52 g), uniface mint error, Rome, circa 265-268. GALLIENVS AVG Radiate head of Gallienus to right. Rev. Blank. Cohen 699. MIR 616a. RIC 249. About extremely fine.


This mint error occurred when an unstruck flan became lodged in the reverse die, much as brockages occur when a struck coin adheres to the die, leaving an incuse impression of its design on the following coin.