Your first seal shows the
portrait of a private citizen. The
reverse has
his name in Latin. I read CRATESIMI ('seal of Cratesimus), but I could not find that name or its Greek transliteration online. Perhaps a book on later
Roman prosopography has it, but unfortunately that's not in my
library.
Your second one is a common as a
type, but very hard to identify when it
comes down to singular examples. Maybe it shows two emperors, an emperor and a
caesar or perhaps a married couple. I would be looking for signs of laurel wreaths to rule out that last possibility.
Regards
Gert