Maximinus II, as Caesar, 305-309. Follis (Bronze, 26 mm, 6.44 g, 12 h), Antiochia, circa 309. MAXIMINVS NOB CAES Helmeted and cuirassed bust of Maximinus II to left, holding spear over his right shoulder and shield decorated with two horsmen riding to left, four enemies below them; on cuirass, gorgoneion; on helmet, Sol standing facing in quadriga, raising his right hand in salute and holding globe in his left, around, stars and crescent, crest ending in griffin. Rev. VIRTVS EXERCITVS / B / ANT Virtus standing front, head to left, resting her right hand on decorated shield and holding spear in her left; in field to left, lighted altar. RIC 125
some conjecture in an attempt to put this type in context--
Though the mint of Antioch struck this type for Galerius and Maximinus; the obverse with the highly decorated armored bust was only struck for Maximinus II. Antioch was likely his principal residence from 309- 311, so not surprising this special type was struck there. This type may also have referenced the campaign against the Sassanids (not only the martial bust, but also battle scene on shield) waged by Maximinus (late 309-early 310) and perhaps also his desire to be named Augustus; which may have happened during the same campaign-- "at the last general muster he had been saluted by his army under the title of Augustus." (Lactantius XXXII) Galerius recognized him as Augustus (mid 310) but since the troops of Maximinus had already raised him up, this was probably just a formality.
and a common boring coin
IMP C GAL VAL MAXIMINVS P F AVG; laureate head right.
SOLI INVICTO; Sol standing left in long robe, right hand raised, left hand holding head of Serapis; BI in left and #10038; in right field.
In ex. ANT
RIC VI Antioch 167b