Tacitus. AE Antoninianus. Lyons. Unlisted reverse for Lyons. 

IMP CM CL TACITVS AVG, radiate, draped, cuirassed bust right

CONCORD MILIT, Emperor togate, standing right, shaking hands with Concordia.

Mintmark CA

RIC V (1) unpublished.

This is an unlisted reverse type for Lyons.

Collection of Emanuele Giulianelli, Feb. 2010.