I found this image on the internet a while ago. Whoever the owner is...congratulations, this is a unique Fred Moore doodle sheet. Starting out with red pencil, Fred explores a variety of poses. Then, in usual fashion, he adds black pencil lines on top. Those lines are the ones that matter, the red under-drawing was research in order to get to the final form defining black lines.
There is just one unusual thing going on here.
The red under-drawings show Mickey's eyes with pupils, the "modern" design. The black lines refer back to the "old" eye treatment, solid black ovals.
There is no doubt that these sketches were made during Mickey's eye transition in 1938/39.
It's just that you'd think Fred would draw the old design first, then add the new Mickey with pupils on top.
Curious....