This type is not listed in RIC with a cross as the only field mark, the cross in right is only listed with star in left.
Aelia Flaccilla
A.D. 383- 388
22x25mm 4.6gm
AEL FLAC-CILLA AVG, diademed & draped bust right
SALVS REI-PVBLICAE, Empress standing facing, head right with arms crossed on breast, cross in right field.
In ex. dot SMHA
cf. RIC IX Heraclea 25
Wife of Theodosius I