It is time to ask design - from the investment point of view, it becomes more attractive.
In principle, I think it is entirely appropriate - for furniture and tableware to the 1940's. have long been in the category of "art" and have become collector's items, with prices of style «Art Déco», for example, reached a quite dizzying heights - think about the chair of the collections by Saint Laurent
Speaking about design, we have to deal primarily with brands, because here we are dealing with the production edits.
For example, all known names such as Rosenthal, Daum, Lalique ... As you see, I list the manufacturers of glass, and it is not by chance - I love glass and I think I know him well enough. I hope that the forum there are specialists in furniture and porcelain, which will continue the story.