Constantine, AE follis. Alexandria. AD 311. 7.59g.

FL VALER CONSTANTINVS P F AVG, laureate head right.
BONO GENIO PII IMPERATORIS, Genius standing front, looking 
left, holding patera and cornucopiae.
Crescent over K in left field, A over P in right field.
Mintmark ALE.

RIC 136.
Rare. 

With permission of Numismatik Lanz, auction 97, lot 989.