Tacitus, AE antoninianus. Siscia. IMP CM CL TACITVS P AVG, radiate, draped, cuirassed bust right. PAX AVGVSTI, Pax standing left, holding olive branch and sceptre. Q in right field. Mintmark XXI. RIC V-1 186; Estiot 2231, La Venera 1808 Forum Ancient Coins, 2004.