I currently stay in Vienna and took the liberty to show the photos to a couple of the local dealers today. Their verdict ranged from "East Block" to Bohemia or Chec. Dates ranged from recent (this guy I dont really know and it is the first time I've been in his shop and I hope he gets a lot of "recent" weights at bargain prices
) to betwen 1900-1920.
They all agreed that it was not made here as nobody has record or knows of anyone ever making weights in Austria. Also the quality is not consistent with the general quality of glasswork in Austria.
Now to complicate the matter there are a couple of places named Viena (note the single "n").
There is one in Greece that could have been touristy and then there is one in the old Russia, which could explain the East BlocK manufacture (and a search on the web shows several others). I do not think that many English tourists went to the East Block though.
Now in case you are not confused on the origin of the weight yet I would like to mention that there are several places in the USA named Vienna (double "n"). Now if one follows the argument above and asumes that a lot of people, and many of them were craftsman, imigrated to the USA at the turn of the century (not this one the other one) and many of them may have had limited english and maybe even less literacy..........
I hope that makes the origin of the weight clear.