Isn’t it the wrong colour for you NevB

Yes, nice engraving - the seated lady must only be about an inch tall.
The glass in the Sotheby’s Krug Collection mentioned in reply #13 does look quite similar. It is a Silesian Zwischengold Portrait Glass, similar examples of the Krug glass can be seen if you search “Johann Sigismund Menzel Glass”. Here is an example
https://www.dorotheum.com/en/l/6007203/ . The proportions (especially of the square stem compared to the diameter of the knop) and symmetry of those glasses look much better to me. They also don’t have the rough join between the square stem and bladed knop, the “join” looks more like a properly formed knop.