Mấy cái tròn tròn đó là gì?

Original file was made by Printables user; “Flameintherain” (awesome name ngl) - measuring at approximately 215x250x15mm. As much as I love their design, I unfortunately don't have any space on my walls to display it; so got to work thinking of ways that I could still enjoy the user's work.

Eventually decided to scale the original down and shape it into a miniature version of the Curator's museum display that we see at the end of the 50th Anniversary (Reference Picture Included!)

Now I have my own collection of round things that I can admire on the go; thought that others might like a version as well for their own set of Tardis keys? ;D