Studio glass vase, height and diameter appr. 14 cm, quite heavy.
Base ground and unpolished, with engraved signature (which is almost impossible to see, or read -- "Bu..."?) and the date 1987.
I tried the pencil and paper method

The piece is nicely made I think (doesn't look amateurish to me), thick clear casing with inclusions and some silverchloride on the surface, giving a soft iridescence. Semi-opaque inner casing.
Any help highly appreciated as always!
Thanks,
Michael