GERMANIA INFERIOR. Æ Dupondius (31mm, 15.61 g, 6h). Countermark applied during the reign of Nero, AD 54-68 or the Flavians, AD 69-96. BON(vm) in a rectangular countermark on a bronze as of Antonia. Pangerl 42. Host Fine, c/m VF, brown patina.
From the Richard Baker Collection.
The countermark was liked applied to certify the coin as good: Bon(vm.