AR Denarius (18mm, 3.01g, 6h). Rome mint, struck Sept 18 - Dec 31, 91.
IMP CAES DOMIT AVG GERM P M TR P XI, head laureate right; IMP XXI COS XV CENS P P P, Flavian Minerva cult statue standing left, with thunderbolt and spear, shield at her left side (M3).
RIC 726 (C), BMC 184, RSC 268.