I'd feel confident that the one in the middle is genuine. They did write on some pieces & used stickers that would / should be scrubbed off if you're using it as a utilitarian ware (no-one thought that these would be valuable w/ or without out a sticker).
I have 2 of those 3 Niloak forms in a closet right next to me as I write.
The one on the left reminds me of Haeger or Royal Haeger.
I wish more people "looked" as well, the history is cool & progression important.
Thanks for writing & good luck!