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This is an ancient Roman Copper As, of Emperor Antoninus Pius, minted at Rome between 150 - 151 AD
Obverse: IMP CAES T AEL HADR AN–TONINVS AVG PIVS P P, "Supreme commander (Imperator), Caesar, Titus Aelius Hadrianus Antoninus, emperor (Augustus), Pius, father of the nation." Head of Antoninus Pius, laureate, right.
Reverse: TR POT XIIII COS IIII IVSTITIA AVG S C, "Holder of tribunician power for the 14th time, consul for the fourth time. Justice of the emperor (Augustus). Decree of the senate." Justitia, seated left, holding patera in right hand and sceptre in left.
DENOMINATION: As As (1/16 of a denarius)
DATE: 138 - 161 AD (minted at Rome between 150 - 151 AD)
SIZE: 25mm diameter
WEIGHT: 11.37 grams
ATTRIBUTION: C 474; RIC III Antoninus Pius 881
PROVENANCE: Formerly in a private collection, Kehl. Germany