Topic: Crystal Wine Glasses and Bowls: Maker?

[Birkyc]

Just wondered if anyone might be able to help me identify these cut crystal glasses and bowls. No marks or labels attached.
Lovely cut design, both also have deep star cut bases.

The glasses are 16.5cm tall, 9cm diameter rims, hexagonal stems and 7.7cm diameter bases. They weigh on average around 330g each.

The bowls are 6.5cm deep and 12.5 cm in diameter at the rim. They weigh on average 300g each.

If anyone can help with any suggestions as to who the maker may be, the name of the cut design or the age of the glasses I would be very grateful.

Thank you.