What can I say... You are absolutely amazing- I consider the ID of the mark solved- thanks so much!:)
It looks identical as color and style of the decoration with
http://ces.mkcr.cz/cz/img/1/5/6/p73685.jpgI was wondering if it is possible for Anne Tique to post a little bit more info on the paper label - like when it was used and a brief description/ scan if possible. It is always good news when another marking is identified

Regarding the decoration- At first I thought it is Japanese or Chinese influenced and now that I looked at the one
flying free has found I am convinced that it has Chinese influence. Goggle "Chinese clouds" images and you will see the similarity

As for the technique used applying the decoration I am still intrigued and maybe someone with glass making experience can give a suggestion.
I don't think it has been etched as cameo and then reheated so that the relief to sink even though it could be possible and makes sense ( I was thinking about it too) . The wall of the vase is too thin for cameo glass and there must be another technique used. Reheating cameo glass to my knowledge is usually done only for light surface polishing. I think reheating it this much will distort the borders of the decoration and probably produce a bulge to the inside. This was decorated still hot but how...
Dimi