Antoninus Pius, AE sestertius, 31 mm.

ANTONINVS AVG PIVS PP, laureate head right.
TR P COS IIII IMP III, she-wolf standing right, 
suckling the twins Romulus and Remus. SC below.

RIC III 788; Gnecchi Coll. 52 in RIN 1914 (this coin)

Image is from Rivista Italiana 1914.