RIC 710 is listed with the obverse titulature IMP C M AVR PROBVS P F AVG
and reverse legend PAX AVGVSTA

It's cited from Rivista Italiana di Numismatica 1891
"Unpublished coins from the Public Museum at Trent"

The coin (65) mentioned in that publication has obverse titulature
IMP PROBVS P F AVG

In either case, those would be orthographically incorrect variants of either RIC 711 (if as listed),
or 713 (as is the case), and not deserving a separate listing as RIC 710.