It’s always been my intention to not make my posts comprehensive. I try to keep each one focused on one thing, and provide what I can from my collection of stuff, without doing a lot of research. Tom Tastewar, who shall henceforth be called just Tastewar, because it sounds edgier, has done some checking into Lon and Derrek Van Eaton. 
In this instance, a little looking on my part would have served me well, because Tastewar found a link with animated GIFs of something that was included in Brother, the Van Eaton’s Apple LP. Here’s the link. I had totally forgotten about this! It’s a strip of paper with slits, printed on both sides, that you put into a loop, placed on the turntable, and played like a zoetrope. One side had Lon, the other had Derrek. It’s the next step up from a flip book in animation technology. Mine has been lost for ages. I remember the first time I realized it was missing, but I have no idea what happened to it.