Tacitus, AE silvered antoninianus. Antioch.

IMP CM CL TACITVS AVG, radiate, draped, cuirassed bust right.
CLEMENTIA TEMP, Emperor standing right, holding eagle-tipped sceptre, 
receiving globe from Jupiter, standing left, holding sceptre.

S in lower centre.
Mintmark XI.

RIC V (1) 211 var (unlisted officina letter), rare.
Contributed by "Nureldeen" of the Forum Ancient Coins, Jan 2011.