Here's a recent addition and of slight interest is the slight drapery over the left shoulder.
Diocletian
A.D. 289- 290
Ӕ Antoninianus 22x24mm 3.7g
IMP C C VAL DIOCLETIANVS P F AVG; radiate and cuirassed bust right, slight drapery over left shoulder.
CONSERVATOR AVGG; Diocletian stg. r., and Jupiter stg. l., sacrificing at altar, each holding sceptre; B in right field.
In ex. XXIO
RIC V Siscia 263
it's part of the coded series
http://www.constantinethegreatcoins.com/CONSERVATOR/
