Galerius Follis. 311 AD, struck under Maximian. 

DIVO MAXIMIANO MAXIMINVS AVG FIL, laureate head right
AETERMAE MEMORIAE GAL MAXIMIANI, eagle standing left on
garlanded altar, crescent over K in left field; Gamma over 
P in right field; ALE in ex. 

RIC VI 133, rated common.

The reverse spelling of AETERMAE appears to have been deliberate
as it has been noted on a number of different dies.

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