Faustina II. AD 147-175. AE Sestertius with engraver's error. 30mm, 23.57 g. Rome mint. Struck under Antoninus Pius, ca AD 154-157. 

FAVSTINA AVGVSTA, draped bust right.
VICSET PII FIL (sic), S-C across fields, Spes standing left, holding flower and raising hem of robe. 

Engraver's error (rev. legend) of RIC III 1371 (Pius); Banti 16 etc. 

With permission of cngcoins.com, auction 466, Lot 445, April 2020.