I think the shape conforms to what collectors call a drawn trumpet i.e. the stem is drawn away from the metal of the bowl and not added afterwards as in 'stuck straws' (those three piece glasses where bowl, stem and foot are made separately then stuck together whilst soft). The foot appears thick although not a problem I don't think, but need to be wary in case this has been ground down to erase chips) - and the nipple does occur on some of these pieces - I forget what Peter (Oldglassman) said about this - it might be caused by pressure of adding the foot, but not sure.
Despite the smallish overall size and lack of h.& b. engraving, think probably an ale in view of the shape of the bowl - the round stem as opposed to facet cut, may also indicate ale rather than wine.
When the foot is viewed from underneath, does it appear perfectly circular, or is it noticeably irregular - and can you see striations in the top half of the bowl, running round the bowl, and what is the colour of the glass?
If you look in Bickerton almost all of his ales, with plain straight stems, show engraving of h. & b. - so on the face of it this one is unusual.
Assuming this is a genuine period glass, then date wise could be anywhere from 1750 to 1820 - all of which qualifies it for being Georgian - it's just which one I'm not sure.
If Peter is there perhaps he will give us a hand with this one - thanks.