AR Denarius (19mm, 2.91g, 6h). Rome mint, struck Sept 18 - Dec 31, 81 (Third Issue, RIC's "Group 4"), ahhaa.
IMP CAES DOMITIANVS AVG P M, head laureate right; TR P COS VII DES VIII P P, draped seat, winged thunderbolt above, pulvinarium of Jupiter.
RIC 70 (C), BMC 15, RSC 575.
Private purchase.