Watch List notes:

Octavian, as Sole Imperator, Silver Denarius (3.78g), 30-29 BC. Uncertain Italian mint (Brundisium and Rome?) Bare head of Octavian right, within linear circle. Reverse: Octavian in car of facing triumphal quadriga atop single-span triumphal arch with IMP CAESAR inscribed on architrave. RIC I, 267; RSC 123. Minor surface marks, otherwise a remarkable specimen, boldly struck on a broad flan of sound metal, with attractive light toning over residual luster. Superb Extremely Fine. Estimate Value $2,500 - UP
This is one of the most starkly beautiful denarii of the imperatorial era, omitting as it does all legends save for the inscribed architrave of the triumphal arch on the reverse. This is the so-called Actian Arch erected to celebrate Octavian's victory at Actium over his rival and former fellow-triumvir Marcus Antonius in 31 BC.