Sorry Michael, I cannot be very precise. I think it is a lovely example, Jindrich will know the colourways of Vizner pieces better than me, you could email him. I think it looks nice 70's, but I could be wrong so I hesitate to comment further. There are some very distinctive colours that clearly shout later Beranek glass production but this doesn't shout it to me..... Surely this piece did not cost you five euros! Very impressive vase, I think,
Robert (bOBA)