Hi, I have been trying to work out who made this for too long now so it is time for some outside and more expert help.
This vase is toe crushingly heavy at over 3.3 kg (27 cm tall), has a concave base and the rim is thick and round in cross section.
Very faint 'swirls' can be seen in the glass of the base, looks like clear glass in clear glass if that makes any sense, difficult to describe and little luck so far in photographing them.
I would welcome any ideas, many thanks.