hi Mat -- our sincere thanks for taking the time to provide a very interesting reply - look forward to seeing more of the pieces you have found after Easter.
Problems that plagued earlier localized glass producers throughout Europe, was the need for fuel for the furnaces and quality sand, and perhaps there were difficulties with some of these materials.
It would be interesting to know if there were specific characteristics of Greek Glass, or whether features were simply copied from central European styles.
What would a typical ouzo drinking glass have looked like in the C19?
Would agree that the piece you have shown looks to be C19, but we have others here who will know more about mid/eastern European styles - certainly the frilly/crimped rim also looks right for the period.
You'll probably be aware that the snapped pontil scar has a long history in the glass industry, and appears frequently on all sort of wares even to the end of the C19 and beyond.
Decoration with enameled colours, and gilding (which may possibly on this piece have been applied by means of transfer) was also very common, and the fact that this isn't lead glass doesn't affect the dating.
Alternatives to lead glass, would have been either soda or potash glass (the alkalis), but chemistry not my thing, so will leave to others to decide - although believe soda glass often gives the glass a browny/yellow cast.
Let's see if others can help to pinpoint an origin and date for you more precisely - but it's a good looking piece.
Thanks for the links - I'm sure we shall have some members who will enjoy this information.