|Mickey Mouse #292 and Mickey Mouse #310|
#310 is the first issue of IDW’s Mickey Mouse run, and also the first time the current Mickey Mouse logo was used on the cover. But it’s not the first time it is used in the comics! Inside #292 the logo is used for the story "The Incredible Black Comet".
|Inside Mickey Mouse #292|
I might be completely wrong about this [just a little, check the comments], but I believe this is the first time it is used as a comic story/comic issue logo. But originally the logo is way older. It’s taken from a 1928 poster, and the logo is (kind of) a compressed version of the opening screen on the very first Mickey cartoons.