Antoninus Pius Sestertius. 29 mm, 21.20 gr. Rome. AD 157-158. 

Obv: ANTONINVS AVG PIVS P P IMP II, laureate head right. 
Rev: TR POT XXI COS IIII around, LIB-VIII and S-C across 
fields, Liberalitas standing left, holding abacus and cornucopiae.

RIC 987.
Rated scarce.

With permission of cngcoins.com, July 2011.