ahhhh - not the first time I have omitted to look

I had in fact typed this just prior to seeing Christine's comment - so with a little adjustment I will let it stand..........
There is a fairly strong passing nod to some of the Jefferson Glass Co. pressed star patterns/surrounding mouldings - and although there are few tumblers shown in the Jean Loomis book - there is an Ohio Flint Glass Co. example from 1905 that appears similar. Unfortunately, the pic. is too small to be reliable. We need some of the 'Krys-Tol' experts from
your side of the pond to help confirm or deny

P.S. thank you Christine.