Here is a image of my last two glass buys. Both via thE bay as I browsed for the odd bargain.
The small glass on the left is possibly early to mid C18 and is the usual size (included for size comparison).
The larger glass was a great surprise. The seller had listed it as an old glass with no real dimensions. I bid and won it

and expected a glass as small as the one on the left, very possibly with a folded foot. Imagine my surprise when this half pint goblet arrived.
I believe that it probably is not a Georgian piece, but is an interesting piece regardless of its age.
The bowl and stem certainly have striations and some inclusions, the foot has a snapped pontil but not a folded foot. The foot has very little in the way of striations but has significant wear. The engraving is detailed and fine, quite a good quality engraving.
Could this be type of glass be a C20 reproduction?
It's a really nice piece anyway....
Dave
Edit: I wanted to add, if this is a piece from C20, handmade and finished to this level, would it have been an expensive piece?