Hi - welcome to the GMB.
The design of your paperweight is quite common in various European countries, and has been made throughout the last 100 years or more. Also, immigrant workers to the USA took the design with them, so a good number of similar pieces emerged from a variety of American glass factories, sometimes as formal products but also as 'friggers'. If it was in Europe I would suggest it might have been made in Bohemia (the Czech Republic) or Alsace, but I suspect yours would have been made in the USA.
Hope this helps