Probably not too clear from the pix, but this has acquired some noticeable sun-purpling, or possibly even made this way, deliberately - I believe there are still one or two manufactuers who create this colour to suggest, fraudulently, a greater than actual age. Very difficult to date, since whilst looking like something from the lat C19 - early C20, there is a total absence of any wear or age related marks.
Probably British, so shouldn't be here I guess, and the Mods can move if necessary. Height is c. 6" - 155mm, and there are four mould seams.
It came in with several genuinely older pressed drinking glasses, so might have some age, and just not been used - looks as though it was made yesterday.
So, who were/are M. G. EDSON & Co.? - I did have a little trawl on the internet, but wasn't aware of seeing the name.