From the age when corporations directly sponsored TV shows comes this color animation cel from 1959. It features Baba Looey of The Quick Draw McGraw Show on top of a wagon spiriting a Kellogg's banner. The show was sponsored by Kellogg's when it debuted in 1959. Kellogg's - The BEST to You Here's a sample of the opening theme for the show, although this particular cel is not part of it.
Here's an interesting cel featuring some vintage cereal mascots, Quake and Quisp, with a third character I've not seen before. If anyone knows who the man in the black hat is, drop a comment below.
Here we have a hand-painted title card for what is likely the first of several Super Friends TV cartoons. I'm fairly certain this is from the initial one that aired from 1973 to 1974, and it features Batman, Robin, Wonder Woman, Aquaman, and Superman. Click on the image for a larger version.