Here is a very rare type for Magnentius struck for his consulship in A.D. 351.
RIC 164-166 depending on reverse break or exergue.
Magnentius
20.2mm 2.7gm
BEATITVDO PVBLICA (Public Bliss) the emperor seated on curule chair
RIC VIII Aquileia 164, Bastien 353
The top example was mine. I bought it uncleaned and unattributed on eBay. Later I put it on consignment with Marc Breitsprecher at Ancient Imports who sold it some months later. He told me it went to a collector in France.
nice find, I am still looking for an example