Watch List notes:

Augustus. 27 B.C.-A.D. 14 AR denarius (20.3 mm, 2.76 g, 5 h). Rome mint, struck 18-17 B.C. [IMP], helmeted head of Mars right / CAESAR, shield with star in center, two spears behind. RIC I 274; RSC 44a. Toned Fine, scratches. Rare. 

Ex D. Thomas Collection.