Watch List notes:

Tacitus, 275-276. Antoninianus (Billon, 23 mm, 4.56 g, 6 h), Serdica, 1st officina (A), early 276. Radiate, draped and cuirassed bust of Tacitus to right. Rev. CONSERVAT MILITVM / A/KA Mars standing right, holding spear in his right hand and presenting globe to Tacitus standing left, holding scepter in his left. BN p. 404. RIC 191. RIC V.1 Online temp. 3899. Silvered. Hairline flan crack, otherwise, about extremely fine.
From the Trausnitz collection.