Rome mint, 90-91 AD RIC 722 (C2), BMC 182, RSC 263 Obv: IMP CAES DOMIT AVG GERM P M TR P X; Head of Domitian, laureate, bearded, r. Rev: IMP XXI COS XV CENS P P P; Minerva stg. l., with thunderbolt and spear; shield at her l. side (M3) Nice example in good style!
Oops! I gave you the wrong minerva attribution for the issue. Yours is a 'M4' not a 'M3'. So, Minerva stg. l., with spear (M4).
I have a silver Vespasian I will photograph soon as well, I haven't attributed it properly yet but it might be the last year of his reign COSV1111.
I have a Domitian Minerva Sestertius: IMP CAES DIVI VESP F DOMITIAN AVG P M / TR P COS VIII DES VIIII P P S C Sestertius, Rome, 82 33 mm / 28 gr RIC 240, BMCRE 276