This coin has two emperors on it! The current one Antoninus Pius and the future great, Marcus Aurelius. Pius’ portrait is bold and well executed. Aurelius’ portrait is softer. It was minted in Rome, AD 140. S-4523. Overall, a very pleasing example of this popular type!
Obverse: ANTONINUS AVG PIVS P P TR P COS III. Bare Head of Antoninus Pius right.
Reverse: AURELIUS CAESAR AVG PII F COS. Bare Head of Marcus Aurelius right.