AR Denarius (19mm, 2.99g, 6h). Rome mint, struck Sept 18 - Dec 31, 91, agham.
IMP CAES DOMIT AVG GERM P M TR P XI, head laureate right; IMP XXI COS XV CENS P P P, Capitoline Minerva cult statue standing left with spear (M4).
RIC 727 (C), BMC 186, RSC 267.
Ex Petronius.