Hadrian, AE19 Quadrans or light As, 4 gr. 

HADRIANVS AVGVSTVS, laureate head right.
COS III PP, crescent and seven stars.

RIC II 731.

Extremely rare. 
This coin is so rare that even the RIC author did 
not know whether there was S-C across the fields on 
the reverse (there isn't).

Contributed by Miro J., August 2014.