The cartoons were usually rich and lush, and animated on ones. The original soundtracks were usually stripped off and replaced by an unnecessary narrator. But they were pretty cool.
An anonymous blogger has posted on Kino en Esperanto rete a group of very attractive animated shorts from 1951-3 based on folktales from Russia and various Asian countries. They look a lot like the stuff of Capt’n Sailorbird. These films are subtitled in Esperanto (as is the rest of the site), but if you can get past the language, our benefactor has the full films available for streaming and download. There is some bizzare stuff here.
(Thanks, Eric Wilson)