Sorting though the backlog some this weekend and found this little gem I had forgotten about.
Claudius II, Posthumous (270-271?)
DIVO CLAVDIO, Radiate head right
PAX AVGVSTI, Pax standing, holding olive branch and scepter, A to left
Not in RIC, not on Wildwinds. Spreadsheet from Romancoins.info lists it as Normanby Hoard 1128, Rare (without A is scarce).

It seems a bit common to be an error, but perhaps it could be a mule with this rather common Quintillus type:
https://www.acsearch.info/search.ht...r=0&company=Or maybe it celebrates the peace that the dead Claudius brought to the empire?