Tacitus, AV light Aureus, Rome. 

IMP CM CLA TACITVS AVG, laureate, draped and cuirassed bust right.
ROMAE AETERNAE, Roma seated left, holding plain globe and 
sceptre. 

RIC 79; Calico 4110; Cohen 121; Sear 11758.

With kind permission of Numismatica Ars Classica, 2008.