Maximinus II AE follis, Cyzicus. 

IMP C GAL VAL MAXIMINVS PF AVG, laureate head right.
VIRTVTI EXERCITVS, Mars walking right in military dress, holding transverse spear, trophy over shoulder and shield on left arm.

B in left field, star in right field.
Mintmark SMK.

RIC VI 110A (new group). This group, known so far for Maximinus II and Constantine, is not in RIC.
NotinRIC 6cyz-110_b

Contributed by Richard Demarco of Carpe Diem Numismatics, April 2020.