I'd agree with Neil - not Georgian I'm sure - the foot diameter looks too small.
As for the pontil scar - believe this is can be found on glasses right through to about 1870 ish.........they appear on some of the tall pressed thumbprint ales occasionally (the Sowerby sort) - although they seem mostly to have gone by about c. 1860, after which the Y and T marks start to appear (on lesser quality glasses).
I thought we'd killed off the Y or T marks being from the gadget

- when Peter put us right some time last year - they are apparently caused by the shears when separating the gob on the foot from the pontil rod.
My own opinion is that this is not a deceptive glass. There are drinking glasses from the middle third of the C19 showing this thicker walled feature - noticeable on some rummers especially - where this thickness appears on the lower two thirds of the bowl. Other than suggesting this is happens for some reason during the blowing process, I don't know the cause.
Having said that, I can't really see the full outline of this bowl - so if the depth is more like a penny lick, then I'm wrong and you're right, but assuming the depth to be standard, then probably not deceptive.

Date wise not really sure - these hollow stems aren't easy - but if pushed I'd go for c. 1840 - 1860 ish, roughly, approximately.
