Postumus greets Legion

Probably a double sestertius where the portrait side is nearly entirely obliterated. The reverse is a very scarce type, not in Sear. EXERCITVS AVG; Postumus on horseback salutes four Legionaires holding standards, SC in exergue. Appears in Percy/DeWitt "..Gallic Empire" as #31.
For a brief History of the Gallic Empire in the Moneta Library:
VIEW & DOWNLOAD: Gallic Empire by Percy Webb at this: Gallic Empire