OTACILIA - hybrid antoninianus?

Hello,
I found this antoninianus of Otacilia, but I'm not be able to find it in RIC...




The reverse is "PM TRP V COS II PP", may be a hybrid or a not official coin?
I don't know Otacilia as the gallic emperors
Many thanks!

Hello grigioviola

this is an unofficial coin (fouree coin), explaining why it is unlisted in RIC. I don't have my documents with me, but if my memory serves me well, I've seen this reverse die before, associated to a Gordian III obverse

Best regards

Yes, RIC IVc n. 89 4th issue for Gordian III has this obverse and RIC IVc n. 96 list an hybrid Philip I reverse /Gordian III obverse with the legend "PM TRP V COS II PP".
If unofficial I'm very happy to have it in my collection because I'm a collector of barbarous radiates and unofficial III century coins!
Many thanks for your opinion!