Antoninus Pius. AE Dupondius, 13.47g. Rome, struck AD 145-147. Engraver's error.

ANTONINVS AVG PIVS P P TR P COS IIII, radiate head right,
slight drapery at the back of the neck.
FELICITAS AVA (sic) S-C, Felicitas standing left, holding 
capricorn and long winged caduceus. 

RIC 800 var (rev legend); BMC 1734 var (ditto); Cohen 364 var (ditto).

With permission of Gemini, Auction XI, Jan 2014, lot 443.