RIC Volume VIII - Family of Constantine:
Ambianum (Amiens) Mint
Magnentius, AE Centenionalis, 351-352, Ambianum (Amiens)
D N MAGNEN_TIVS P F AVG
Bare head, draped, cuirassed bust right, A in left field
VICTORIAE DD NN AVGG ET CAE
Two Victories facing each other, holding shield inscribed
VOT / V / MVLT / X, and surmounted by a staurogram (Tau-Rho)
AMB crescent in exergue
20mm x 22mm, 3.03g
RIC VIII, 23 (S)
Ex Midwest "Coins of Christianity" Collection
Note: According to RIC, the Ambianum mint was established by Magnentius in
mid-350 and was the only mint to use a staurogram, instead of a
Christogram (Chi-Rho) like all of the other mints, for this bronze issue.
The mint was closed at the end of 353.