Divus Claudius II, Antoninianus, ca. 270 AD, Milan. Posthumous issue by Quintillus. 

DIVO CLAVDIO, Radiate head right
CONSECRATIO, Altar with flames above, front divided into four sections with dot in each section. 

Mintmark Q. 

RIC V-1, 261 Milan, cf. Minster hoard 486 for altar type.

With permission of Roma Numismatics, Apr, 2010