Watch List notes:

Augustus (27 BC - AD 14), As struck by C. Cassius Celer, Rome, 16 BC; AE (g 20,08; mm 30; h 7); CAESAR AVGVSTVS - TRIBVNIC POTEST, bare head r., Rv. C CASSIVS C F CELER IIIVIR A A A F F, around S C. RIC 376; C 409.
Specimen struck on a full flan, heavy as a dupondius, maybe a presentation piece. Green patina, somewhat smoothed, anyway about extremely fine.