In lieu of new film elements being found, I'd say that this is the best the movie will ever look. It's certainly a watchable transfer, though far from perfect. The film is presented in English in Dolby 1.0 Mono. For what it is, an old, dubbed Mono recording, the soundtrack is surprisingly vibrant. All the sound effects come across well, and dialogue is projected very loudly and clearly Some slight background noise is detectable, but that's it.
Supplements are pretty scarce here.
Of special note is the scene where Orloff's maid is raped by the invisible man, which becomes even more bizarre here. The only other supplement is a trailer. Although the quality of the transfer is a bit disappointing, it's not as disappointing as the film itself. Still, if you're a Eurohorror completist, this may be a worthwhile title for you, just as long as you're not expecting too much.