Constantinopolis Arles PCON mint mark?

[ae22]

I was thinking this is a PCON mint mark,  but if so,  I don't  find one listed with the X in the field  (helvetica's list).

Please let me know what your opinion of  it is.

Many thanks.

Should also say it's 15mm, 1.5g

[Victor]

Yes, it looks like a P, which is not listed for RIC VIII Arles 26...but it is too be expected. Ferrando in L’atelier monétaire d’Arles. De Constantin le Grand à Romulus Augustule, 313-476 lists an example as number 51.

[ae22]

Thanks  Victor