This is very possibly his ring/seal. But it could be an extra copy used by an administrative assistant on his behalf. I speculate this because Pilate was hauled back to time for being too cruel even by the Empire’s “standards.” Found guilty of oppression and executing people without trial, Pilate reportedly committed suicide in Rome under orders of Emperor Caligula ( himself about as far from a compassionate soul as possible to imagine, ha!). This according to the major church historian Eusebius. So, my guess is Pilate’s ring/ seal is buried somewhere in Rome — but this one in Israel COULD be the one he personally used (and if not, then yes it is almost certainly one he authorized an aide to use on his behalf). Either way, a fascinating find by the Israelis
Hauled back to ROME ...that is... ( to stand trial for his cruelty and oppression, executing people without trials, etc)