I created this piece based upon a copy of an old poster published by the British Esperanto Association. I used LibreOffice Draw to produce the piece. It can be easily customized for use by any Esperanto organization. I’d be happy to share it with anyone who would like a copy. A PDF version is also available.
Please let me know what you think about this poster. I have a lot more of this sort of material in mind. I hope that you find it useful.