First and foremost, welcome to this fabulous board.
I doubt you will be surprised - can't imagine Art Nouveau glass like that - especially after Kralik, Loetz & Galle, etc. I agree it looks 50s, 60s or perhaps 70s. I suggest you post photos of the base of anything you want help with. By the way - good photos - very clear.
As a very longshot - that is not the type of glass I attempt to collect - I am wondering about Ravenhead as a possibility.
Ross