Lovely coin! I like that sort of half-patina where a lot of the bronze is showing through. You just have to keep your eye on coins like that for bronze disease - they are very susceptible to it.
That portrait has a very nice style, indeed! Here's a Ceres sestertius from a later era: Faustina Senior, Augusta AD 138-141 Roman orichalcum sestertius; 25.81 g, 31.4 mm, 11:00 Rome, AD 147-161 Obv: DIVA FAVSTINA, bare-headed and draped bust, right Rev: AVGVSTA, Ceres standing left, holding two torches Refs: RIC 1120; BMCRE 1516; RCV 4625
