One of my collecting interests is the 1961 Europa issue. Just 1961!
I've discovered that Cinderellas can add some spice to a collection.
Esperanto and IdoEsperanto is a language that was made up in the 19th century to serve as a universal language. Ido was developed as an improvement on Esperanto.
An esperanto label was attached to this German cover bearing the Europa stamp.

An Ido Europa cinderella stamp was produced:

It looked good enough to fool the German post office:

A souvenir label was prepared for the Naples Europa stamp show:

Cold War related Cinderellas

