Hiya
#1, 2, 5. Vitro hybrid cat's eyes. When I say "hybrid" I'm referring to having multiple colors.
However, they do seem to blur the lines between caged and not.
#3. you could be onto something with your German guess.
#4. Looking like it could be Japanese. Would prefer a head-on look at the cutlines so I can see the vane orientation more clearly.
#6. American-made cat's eye. Could be Marble King. The bubbles make me wonder about some other maker. But in the larger size, it makes me feel like going back to Marble King.