I just bought three more of the coded CONSERVATOR series from Siscia
http://www.constantinethegreatcoins.com/CONSERVATOR/workshop A= I, workshop B= O and workshop Γ = BI I/O/BI for Jupiter (Diocletian)
workshop A= HP, workshop B= KOY and workshop Γ = ΛI HP/KOY/ΛI for Hercules
Diocletian
A.D. 289- 290
Ӕ Antoninianus 23mm 4.0g
IMP C C VAL DIOCLETIANVS P AVG; radiate and cuirassed bust right.
CONSERVATOR AVGG; Diocletian stg. r., and Jupiter stg. l., sacrificing at altar, each holding sceptre; A in left field.
In ex. •XXI•I•
RIC V Siscia 264
Maximianus
A.D. 289- 290
Ӕ Antoninianus 22mm 3.3g
IMP C M A VAL MAXIMIANVS P F AVG; radiate and cuirassed bust right.
CONSERVATOR AVGG; Maximianus holding sceptre, and Hercules, leaning on club; standing face to face, sacrificing at altar.
In ex. XXIA•HP
RIC V Siscia 580
Maximianus
A.D. 289- 290
Ӕ Antoninianus 22mm 3.3g
IMP C M A VAL MAXIMIANVS P F AVG; radiate and cuirassed bust right.
CONSERVATOR AVGG; Maximianus holding sceptre, and Hercules, leaning on club; standing face to face, sacrificing at altar; Γ in right field.
In ex. •XXI•ΛI•
RIC V Siscia 580