the workshop on this Severus II looks like E; which is not listed in RIC.
Severus II
A.D. 306- 307
27mm 8.3g
IMP C FLA VAL SEVERVS P F AVG; laureate head right.
GENIO POPVLI ROMANI; Genius stg. l., modius on head, naked but for chlamys over left shoulder, r. holding patera, l. cornucopiae.
In ex. HTE
RIC VI Heraclea 30