this is a tough type to find for Postumus and it is in pretty nice condition.
the dealer's description-
Roman Imperial antoninianus 268 AD.
Grade: Very fine | Abbreviations
Catalog: RIC 324; Elmer 592.
Material: Silver
Weight: 3.09 g
Colonia Agrippinensis.
Obv: IMP C POSTUMUS P F AUG, radiate, draped, cuirassed bust of Postumus to the right.
Rev: REST ORBIS; Postumus standing to the right, spear in left hand, extending right to turreted female figure kneeling to the left before him, with cornucopia in left hand, clasping the emperor’s hand with her right.
Ref: Ex Lückger collection.