Could you please post a link to the kunstandel & galerie site, as I tried unsuccessfully to find it through Google.
Did it have a vase the same height as yours with a label, or signature, or did they show a catalogue page/book reference to support the attribution to Josef Schott?
It would be helpful if we can include a confirmed attribution here, as I think this thread might grow given the number of similar unsigned pieces.
To avoid confusion, is yours the one listed today on eBay?
Thanks
Cat