Watch List notes:

Octavian as Augustus, 27 BC – 14 AD. Denarius, Colonia Patricia 18 BC, AR 3.83 g. CAESARI – AVGVSTO Laureate head r. Rev. Slow quadriga r. containing aquila and surmounted by four miniature galloping horses; in exergue, S·P·Q·R. C 274. BMC 392. RIC 108a. CBN 1178 (different positions of the horses).
Rare. Superb iridescent tone, struck on a narrow flan,
otherwise virtually as struck and almost Fdc