Upvote:7
I think that what you have there is actually a 'silver' Antoninianus minted under Caracalla:
You are correct that the seated figure is Victory (seated facing right on her cuirass, with a shield on her knee).
The text on the obverse reads:
ANTONINVS PIVS AVG GERM
and on the reverse:
P M TR P XX COS IIII PP
The text under the seated Victory is:
VIC PAR
and
VO XX
is inscribed on her shield.
The Wildwinds site has an extract with the relevant information from the 2000 Sear catalogue of Roman Coins and Their Values.