A nice vase Anik. I cannot help much but I thought this vase was Czech when I saw it 18 months ago in a smoky dark colour and nearly bought it, but I have no evidence about the piece.... could be Czech, maybe unusual ZBS but as likely is Magnor or similar - I really do not know but a nice thing! The chamfer-bevelled edge to the base always suggests quality to me.
Robert (bOBA)