Gallienus, AE antoninianus. Rome, sole reign. 257-258 AD.

IMP GALLIENVS AVG, radiate, cuirassed bust right.
DIANA FELIX, Diana walking right, drawing bow and holding
arrow, hound at foot.

RIC V-1 Rome 174 var (bust type); Goebl 920L (Milan).

With kind permission of Numismatik Lanz, Auction 2004.

Note: Goebl places this coin (i.e. this obverse legend
and this rev. type) under Milan, RIC places it under Rome.
The letters N and M, engraved as III and IIII are 
characteristic of the Rome mint.