Watch List notes:

Severus Alexander with Julia Mamaea (222-235). AE 28 mm. Marcianopolis mint, Moesia Inferior. Obv. Confronted busts of Severus Alexander right, laureate, draped and cuirassed, and Julia Mamaea left, diademed and draped. Rev. Naked Apollo standing left, holding patera and branch; E to right. Varbanov-. AE. g. 13.57 mm. 28.00 RRR. Very rare, not listed in Varbanov and apparently unpublished. Brown patina. VF.

E in reverse field is the mark of value (Pentassarium).