Classical Cash and OldRomanCoins.com present:

   Janus, struck as, VF, green patina

     Anonymous, AE as, (18.41g) After 211 BC, Laureate head of Janus
     right, I above. / Prow right, I above, ROMA in exergue. C56/2.
     VF, dusty dark green patina. Goodman Collection. This example
     quite light, but of respectable, indeed impeccable, style and
     certainly official.