Claudius II, AE antoninianus, Rome or Milan mint.

IMP CM AVR CLAVDIVS AVG, radiate, draped, cuirassed bust right.
PM TR CO PP, she-wolf standing right, suckling twins.

Mintmark SPQR.
Alfoldi 50/7; RIC -.
Rare
Note: This coin uses the basic reverse die of Gallienus
RIC_0628, simply re-engraved with a different legend. 
This was a common practise at this time, in order to speed up
production of coins for the new emperor.

With permission of dirtyoldcoins.com