I'm assuming then that the figures are not painted...
The Jose Carioca charm dates the piece between 1942 thru say, 1946. There was a Jose charm made, and sold seperately.
I keep thinking about this being a gift from Walt... If you would take the piece to a jeweler, he could very quickly tell whether the charms are gold or not. If they are gold, this was probably produced by Cartier of New York during the last year (1942) they had a Disney license during this period. This could have been a sample of a proposed product, or the first of a very short run. I am not sure what the rules were for using precious metals during the war.
I can't find anything like it in my reference books, so I would think, without seeing it, that it is somewhat rare.