Supporting a Walsh identification, in my uninformed opinion, compared with an example image found online, I thought the detail of the engraved design looked very similar, as though it might have been done by the same person. This is the only indicator I have.
Against this, the actual shape of the glass, is significantly not identical to the online image example.
There is no base signature/ID.
What marker should I look for in the fruiting vine pattern?
For comparison, these are images of 1. The online Walsh example and 2. My glass,