The complete showcase of uranium glass at Passau very illustrative of the depth and diversity of color to be had. I see how the terms canary, topaz, etc. can be subjective, interpretive and even interchangeable. As you sort of intimated at the beginning of this thread, one persons canary can very well be another persons topaz, I did come across some of Pellats recipes for colored glass collected by M. Drake sometime between 1851-1874. Of note is the last entry from the table of contents.
The crown if actually plated/cased with yellow glass a small ' Tour de Force'. I wonder if the yellow may be a silver stain [ not silver color, silver in the stain batch to get the yellow].