hmmmm..............insofar as part of the 'Kenilworth' stem is round, I'd agree..........but then lots of stems are round in part

What about the large merese/knop/collar thing under the bowl, both in Kenilworth', and in 'Fruiting Vine' - the stems of which are almost identical (with each other), but not with your glass I don't think.
Although your glass may well be Walsh, I don't think comparing the stems with the above cut patterns is sound enough reason.
However, your stem does look much more like the examples in the Walsh brochure in Charles Hajdamach that Mel drew attention to - so on that basis you're more likely to be correct with Walsh.