The Esperanto Jubilee Symbol (jubilea simbolo) is a cultural symbol that is sometimes informally called the melon (melono), egg (ovo) or football (rugbea pilko).
With a Latin E on one side and a Cyrillic Э(for Эсперанто) on the other, it can be interpreted as being inclusive of East and West.
Nowadays, many people use the Jubilee Symbol to represent the international Esperanto culture as a whole. For example, the World Esperanto Association(in Esperanto UEA: Universala Esperanto-Asocio) and Esperanto-USA use it as their symbol.
(Extract from Wikipedia)