Tacitus AE Antoninianus. Siscia.

Obv: IMP CM CL TACITVS AVG, radiate, cuirassed bust right.
Rev: FELICITAS SAECVLI, Felicitas, standing left by altar,
holding patera and caduceus.
Mintmark XXIV.
Estiot 2267, La Venera 1759. Rare.

Courtesy of cngcoins.com.