This is a signed set of six, high-quality, cut lead crystal wine glasses by Nachtmann, the well-regarded German manufacturer of crystal glassware, based originally in Weiden, Bavaria.
This pattern is called "Vanessa" and it was made from 1998 to 2004. It's an elegant pattern of leaves flowing around the bowl of the glass, while the stem is gently faceted and twisted at the top to match.
If you have any questions, just send an email to [email protected].