JAKJO from sweden told me about a similar vase:
"The "Tango glass"-line (cased basic coloured glass-two colours) was created by Loetz Witwe in 1914. It became immensely popular for over ten years. To name a few of the Austrian, Bohemian and German designers of Tango glass forms and decors; Joseph Hoffmann, Kolo Moser, Edward Prochaska, Marie Kirschner, Michael Powolny, Hanz Bolek and Dagobert Peche.
The known and documented designs are few and because of the popularity they soon were copied, altered and mass-produced by several companies among them Kralik and Rindskopf, making it very difficult to attribute with any certainty to any one of them. Not to mention that Loetz Tango objects were often decorated by other companies for example by the Glasraffinerie und Kronleuchterfabrik - Carl Hosch.
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My tip for you is to search serious and wellknown collectors' websites and try to find the form of your vase attributed to a glass works."
I hope your vase can be identified.... as far as I was told there is only one book about "tango" and this is supposed to be "holy merde"