It's a lovely vase. The OH and I doubt it is uranium; it might be but the photos give no hints like they often do. I don't think it's Walther because it's too green. Walther green seems to come in two shades; yellowish and slightly bluish. I would say Czech or German was likely. The base treatment is not uncommon and, unless it's supershiny (Inwald is likely then), only indicates either hand pressing or semi-automatic pressing, i.e., not fully automated, and therefore likely pre-1960/70s.