That's my first coin of Faustina. And it happens to be the daughter of Empress Faustina I. The following Sesterius has Concordia holding cornucopia and patera on reverse. It weighs 24.73 g. I found similar coins in my research, but they all had a different denomination. Everything but not a Sestertius. Please post a comment if you like.
Nice Sestertius! It is RIC 1368 = Cohen 13 = BMCRE 2198 = Banti 15, struck in AD 161. Banti lists 4 specimens and illustrates one from the same obverse die (A. Myers Auction 2, 1972)
Nice! I love collecting the Antonine women. I think you're having trouble because this was issued by her father, Antoninus Pius, not by her husband, Marcus Aurelius, and you'll have to see the listings under Pius.
Turns out your coin is rather interesting because it also has the variant of the reverse where Concordia is leaning on a column. Last year, I noticed Concordia on this sestertius was leaning on a column, which was not a variety noted by RIC, BMCRE, or Sear. Even though other examples have been sold, it was a matter of some controversy here at CT, but Curtis Clay of the Harlan Berk company was able to settle the matter, noting that the variety had been previously described by Strack. Faustina II, AD 147-175/6. Roman orichalcum sestertius, 29.89 g, 31.0 mm, 6 h. Rome, AD 154-157. Obv: FAVSTINA AVGVSTA, bare-headed and draped bust, right. Rev: AVGVSTI PII FIL S C, Concordia standing left and leaning on column, holding patera and cornucopia. Refs: Strack 1328; RIC --; BMCRE4 --; Cohen --; RCV --.
Oh.. Jesus. I didn't even notice that. The first surprise to me was that , while searching at Wildwinds, I didn't find any Sestertius of Faustina II having Concordia STANDING on reverse.