Watch List notes:

Magnentius. AD 350-353. Æ Double Centenionalis (28mm, 8.39 g, 12h). Ambianum (Amiens) mint. Struck AD 353. Bareheaded, draped, and cuirassed bust right / Large Chi-Rho, A to left, ω to right; AMB. Cf. RIC VIII 34, 36, 38; cf. Bastien 135, 136, 138. EF, even dark brown patina, irregular flan.