Thanks for further comments. I didn't mean to post a "what is it" ID question, more a general query about the range of reproductions out there. But, as you have been kind enough to take the time to look at the images of the big glass,
It's a big glass, 20cm tall, 10.5cm dia rim & 10.2cm dia foot. It weighs a little over 500g. The engraving shows a symmetrical scene of two game birds facing each other on a plane with two trees (of a Chinese style?) with a fence running between them.
The bowl land stem have striations and some inclusions that make me think that it is hand blown. The foot has little in the way of striations but does have a couple of inclusions. The foot shows good wear.
The bubble in the stem appears to have created a dome of glass in the bottom of the bowl, as if it is erupting into the bowl from below, rather than the bowl having a fairly plain interior base.
The pictures were made and processed in a slight rush, please forgive the sometimes lost focus point and reflections.
What's interesting to me, is to determine that it is handmade and hand engraved, perhaps a broad range for it sage would be nice but not critical. Thanks, Dave.