nice pieces, and as always great to have a pair - do we think these are bulb vases - with that waisted shaped neck?
I like the enamelled decoration - I'm ignorant too, but would have gone for either eastern Europe, or even the U.K - have they ever made glass in Switzerland?

Is it the base glass that's amethyst?
From what I can see in the pix, the outer rims of the base look roughly ground - or perhaps I need Specsavers, again. Ordinarily, I'd have assumed these had some decent age - but it's easy to be caught out, so will refrain from offering a suggestion. I think this dimpled design has a definite antique history, so could be some real age there.