Not sure about the history of Koo Koo, but there was apparently two of them, and both appeared in Tod Browning’s FREAKS – a great movie if you’ve never seen it.
The entire month, I will be selling these sketch cards individually for 5 bucks, or as a theme set (7 cards total) for 25. If you want one, let me know, asap via email or other means. At the end of the week, I’ll post the set on my store.
My Art Store