Tacitus. A.D. 275-276. Æ antoninianus (22 mm, 3.62 g, 6 h). Serdica, A.D. 275/6. IMP C M CL TACITVS AVG, radiate and draped bust of Tacitus right / CONSERVAT MILIT, Mars standing right, holding spear and presenting globe to emperor, in military attire, standing left, holding long scepter; A//KA. RIC 193 corr.; BN 1774. Black patina with a silvery sheen. Superb extremely fine.