Tacitus AE Antoninianus, Ticinum.

IMP CM CL TACITVS P AVG, radiate, cuirassed bust right.
SALVS PVBLI, Salus standing right, feeding serpent in arms.
Mintmark T in exergue. 

RIC V-I 159 var (bust type)

With kind permission of Numismatik Lanz, Auction 2002. sold for 200 Euros.