I submitted a (pretty tedious) reply earlier, but it's not showing up. Perhaps it was too tedious! Anyway, I do appreciate the thoughts expressed here. I've surely enjoyed sharing this interesting piece. I will love it no matter what. Just to add a couple of things, I know how difficult it must be to adequately judge an unmarked item via pictures and descriptions that lack clarity. There's nothing like being able to hold the item in your hands and inspect it in person! In answer to a question, the cream colored material is sandwiched between the clear glass body and the silver coating. There are no seams anywhere, but I can feel a very slight ridge under the silver, where the base of the vase was added at the wafer. The glass body was apparently blown. Those who have seen the vase surmise that the cream material was "poured" because of the hole in the bottom. I can look into this hole and see the bottom of the vase body as well as a space between the body and the cream material on the bottom (which is covered with glass that has a slight, smooth pontil indentation). It looks like a process similar to the making of the old mercury glass vases...except that the silver is on the outside here...and no cork. I get the feeling that the cream material was once fluid, since it has shrunk a bit and pulled away slightly from (under) the clear glass in a few places on the ruffle.
http://tinypic.com/9i5moo.jpgThe vase may indeed have been a collaboration between two or more companies. The "Antiques Roadshow" appraisers thought that it was American, anywhere from turn of the century to the 1920's, valued it at from $400-600...I suppose simply due to the rarity and quality of workmanship. Since we have a large German influence in this area of Texas, I am surely open to the idea that it may have an origin other than the USA. I thank everyone for your time and for looking at my vase! If I do happen to discover a definitive history for this lovely curiosity elsewhere, I will post it here for those who may be interested. Thanks again!....Judy