Watch List notes:

Marius, Romano-Gallic usurper, 269. Antoninianus (Billon, 20 mm, 2.85 g, 7 h), Treveri. IMP C MARIVS P F AVG Radiate, draped and cuirassed bust of Marius to right. Rev. CONCORDIA MILITVM Clasped right hands. AGK (corr.) 1b. Cunetio 2503. Elmer 633 ('Köln'). RIC 6. Earthen deposits and with some breaks in patina, otherwise, very fine.