Hi - think you're going to need Peter (old glassman) on this one. Unfortunately, for collectors, folded feet did make a re-appearance in the C19, and snapped pontil scars can appear almost anywhere in the last three hundred years, so these features confusing when trying to nail a date.
There's always the temptation - when assessing glass - to make assumptions that this is a home produced item, and as a consequence try and make something fit with what we imagine would be British characteristics, though this one may well be eastern Europe in origin.
Lots of inclusions may be found on some tavern or pub glasses, but generally C18 glasses were well made and are of a higher quality then we might now imagine. Sometimes the copyists over do the inclusions etc., thinking that poor quality equals age.
Do you see a blip on the rim - caused by use of shears when the piece was on the pontil iron - surplus rim was cut whilst the glass was plastic, and the blip occurs where the shears begin and end - causing a slight thickening at that point. These blips can, but not always, indicate the piece is probably pre 1840. The bladed knop is very wide, though that's not unknown for the C18, and the bowl shape in my opinion might be square bucket or round funnel - it looks a tad in between.
Would be good if this were C18 - if you're there Peter, would very much appreciate your opinion please.
