Watch List notes:

Tacitus (275-276). BI Antoninianus, Siscia mint. Obv. IMP C M CL TACITVS AVG. Radiate and cuirassed bust right. Rev. CONCORDIA MILIT. Tacitus standing right, clasping hands with Concordia standing left; in exergue, XXIQ. RIC V 183. BI. 3.54 g. 21.00 mm. Glossy deep brown, almost black patina. EF.