The rarer Gordian III antoninianus from the penultimate issue in Securitas, with the inscription PERPET on the reverse, the vast majority of this type of antoninianus have the inscription PERP. The type from Securitas is characterized by a very large typographic evolution: first there was the inscription SECVRIT PERPETVA, then the legend passed into SECVRIT PERPET, and in the last issues SECVRIT PERP.
Roman Imperial
Gordian III (238-244), Antoninianus 244, Rome mint
Obverse: radiate, draped and cuirassed bust right
IMP GORDIANVS PIVS FEL AVG
Reverse: Securitas standing left, holding sceptre and leaning on column