Hi. For me, the way the stem and foot look to be joined spoils the overall aesthetic - in the photograph it looks a bit crude, being just a random size blob of glass. On higher quality glasses I would have thought this would be neater, maybe blended, formed into a small basel knop or faceted/cut (as my photos show).
If these were mine I would think they were work a day glasses that pre-date the use of the gadget. After that, if they had gone to the trouble of using the pontil rod and polishing the scar, then I would have thought there would be a better finish at the stem attachment. Obviously I may be wrong! Not sure how this would tie in with the colour and any Whitefriars connection but I assume Whitefriars would be high quality all round.