Watch List notes:

Magnentius. AD 350-353. Æ Double Centenionalis (28mm, 1h). Ambianum (Amiens) mint. 7th phase, January-10 August AD 353. Bareheaded, draped, and cuirassed bust right / Large Christogram; A|ω//AMB. RIC VIII 34; Bastien 135. Brown surfaces, some hard green deposits. In NGC encapsulation 5873633-138, graded VF.