Watch List notes:

Faustina II. Augusta, A.D. 147-175. AR denarius (17 mm, 3.05 g, 6 h). Rome, under Antoninus Pius and Marcus Aurelius, ca. A.D. 154-157. FAVSTINA AVGVSTA, draped bust of Faustina II right / AVGVST-I PII FIL, Aeternitas standing facing, holding phoenix and lifting hem of skirt. RIC -; BMC p. 169, *; RSC 32a. Extremely rare and unlisted in RIC. No examples on Coinarchives or Acsearch. Choice extremely fine.

While this reverse type is very common for denarii struck in the name of Diva Faustina I, it is exceedingly rare for denarii struck in the name of Faustina II.