While unable to give you a positive ID I can tell you that your vase is unlikely to be Rindskopf. Not only the quality of lustering, but the simplicity of the shape point at another direction.
I have one of the blue lustered vases standing next to a Rindskopf, and the difference is striking. The Rindskopf is properly blown with a prominent wall thickness, oven decorated and with a polished pontil. The blue luster vases are thinwalled, mould blown and with a polished rim. I have always believed that the blue luster vases were by Wilhelm Kralik, produced in the 1930s - but it could be a less familiar name. The blue lusters I have seen were all deco in style, not nouveau.