Very rare arrangement of seven stars (Septentriones) in arrow formation, sometimes seen on Eastern mint denarii, but the style is that of Rome.
NGC Certified to Ch VF.
Obverse: HADRIANVS AVGVSTVS, laureate bust right, drapery on far shoulder.
Reverse: COS III, Seven stars within and above crescent moon.
Latin Septentriones refers to the seven stars in Ursa Major that make up the Big Dipper, or sometimes to the seven stars in Ursa Minor that comprise the Little Dipper.
This reverse type was used because stars are a symbol of immortality.