Gold aureus, 20mm, 7.67gm, issued AD 16-37 Lugdunum mint.
Obv: TI CAESAR DIVI AVG F AVGVSTVS, Head of Tiberius, laureate, right.
Rev: PONTIF MAXIM, Female figure (Livia?), draped, right, seated, right on chair with plain legs, holding branch and long sceptre; below chair, a double line.
References: Sear 1760, RIC 25, BMCRE 30.
Minor scuffs on the obverse edge.
The gold version of the famous "Tribute Penny", a collectable first century aureus.
This coin fits the following collection focus(es): Twelve Caesars.