“I grandi successi originali” appears to be a series name, and “Flashback” appears to be an imprint of the RCA Italiana record label. There is a long list of albums with those emblems for many different artists.
Discogs seems really inconsistent on this, but there is some corroboration:
Musicbrainz has a series called “I Grandi Successi Originali,” but it also has that as the album title for most (but not all) of the albums.
It sounds like this is a question that needs an authoritative decision followed by some clean-up. If it were me, I would say:
- Album title: Simply the artist’s name
- Series: “I grandi successi originali”
- Label: “RCA Italiana” and “Flashback” (and possibly “BMG,” if it’s on the back cover)
screenshot from Discogs: