Hi ,
Pedestal stem sweetmeats are thought to have been discontinued around the 1760s , yes tazza's continued with the same stem formations into the 19th c but not sweetmeats,my first reaction to your photo and description of the metal is that it is a reproduction,yep everything has been copied at some time or other , one of the most popular times for reproductions which as far as i can tell from the photo look like yours is around mid 20th cent ,Czechoslovakia was a large producer of reproduction items ,glasses tazzas tankards,anything,museums Corning for example also began to produce glasses in the 17th and 18th c style for there shop and wider distribution I think , anyway better photos if possible would help to be more certain , its certainly trying to look around 1745/50.
Sorry it's the wand of doom again but I can only comment on what I see .
cheers ,
Peter.