Hi Michael,
the three flower trumpet weight (working title) is very difficult to determine- almost every glass making region had workers who made this type of weight, from Bohemia, Bavarian Forest, Austria (Bärnbach, Vordersdorf,...) to Hungary, and moreover Transsylvania (Siebenbürgen) and other places. Most of them are friggers or pause work, used as present for friends, birthdays, marriages and anniversaries. -
Peter von Brackel Shows the broad variety of types, and introduces a weight from Transsylvania on page 131, No. 254, the petals of your flowers are closer to a weight on page 129, No. 247. ( P.v. Brackel, Paperweights, Morsak, 1997).-
Some hints can come from where you bought it, and sometimes there is a family story backing up the provenience: in 95% of the cases, it is lost, in 3% it is false for various reasons, and the rest is hope...
Kind regards Erhard