Watch List notes:

GALLIA LUGDUNENSIS(?). Æ Sestertius (37mm, 26.79 g). Countermark applied during the reign of Nero, AD 54-68(?). (P)ROB(atvm) in a rectangular countermark on a bronze sestertius of Claudius. Pangerl 23 var. (PROB). Host coin VF, c/m VF, green patina, some stress cracks from countermarking. Unusual variant lacking the first letter.

From the Richard Baker Collection. Ex Empire Coins FPL 55 (Nobember 1990), no. 91.