Very rare Antoninus Pius denarius with legend "Primi Decennales Consul quartum" on the reverse, which means "for the fourth time consul of the first decade".
Roman Imperial
Antoninus Pius (138-161), Denarius 147-148, Rome mint
Obverse: laureate head right
ANTONINVS AVG PIVS P P TR P XI
Reverse: column surmounted by statue of Antoninus Pius
DIVO PIO
Weight 3.3 g