Very rare antoninianus of Tacitus one of the shorter reigning Emperors.
Roman Imperial
Tacticus (235-238), Antoninianus 276, Siscia mint
Obverse: radiate, draped and cuirassed bust right
IMP C M CL TACITVS P AVG
Reverse: Emperor and Concordia shaking hands, VI in exerque
CONCORDIA MILITVM
Weight 3.1 g