Ancient Roman Silver Coin - Need help with ID and Value?

pcgs69

I have this silver Roman coin. I'm looking for more info on it such as date span, who's on it, and if there's much value to it. Thank you for any help! I'm a U.S. coin guy, so I'm not familiar with these coins.

John Conduitt

It's an Antoninus Pius denarius, I think obverse ANTONINVS AVG PIVS P P TR P XV and reverse COS IIII with Annona, draped, standing left, holding two corn-ears lowered in right hand and setting left hand on modius set on prow; rudder rests against prow (RIC III Antoninus Pius 204 http://numismatics.org/ocre/id/ric.3.ant.204)