Alexander of Carthage, AE follis, 21mm, 4.89 g. AD 308-311.

IMP ALEXANDER PF AVG, laureate head right.
ROMAE-AETENIAE (sic), hexastyle temple with Roma, helmeted, 
seated front within, looking left, holding globe and 
sceptre, nothing in pediment.

Mintmark PK.
RIC VI Carthage 75 var (rev legend, engraver's error).
Very rare. 

With permission of cngcoins.com, Triton XX, Lot 861, Jan. 2017.
Ex Schweizer Bankverein auction, 27. October 1977, lot 500.