RIC only lists this type with H under bust with Γ in right field.
dealer description
"MAXIMIAN CAESAR AE FOLLIS Trier Mint 295 AD Obverse: MAXIMIANVS NOB CAES Laureate head right, H below bust Reverse: GENIO POPVLI ROMANI Genius standing left, holding patera and cornucopiae; B left; TR in exergue References: RIC 160b Variant (RIC does not list H Under Bust for this type) Very Rare Size: 27mm, 9.61g"