Watch List notes:

The Roman Empire. Octavian as Augustus, 27 BC – 14 AD
Denarius, Caesaraugusta circa 19–18 BC, AR 20 mm, 3.74 g. CAESAR – AVGVSTVS Oak-wreathed head l. Rev. DIVVS – IVLIVS Eight-rayed comet with tail upwards. C 99. BMC 326. RIC 38b.
Lovely iridescent tone and very fine

Ex Gorny & Mosch sale 251, 2017, 4843.