Mickey's first appearence ?

[Mads Jensen]

Hi

I borrowed some documentary at the library, called "The History of 
Animation" where Walt spoke about the history of the animation.

Afterwards it showed the "Steamboat Willie" cartoon, and surprisingly to 
me it said that it was first shown in October, and not in November ?

What defines Mickey's first appearence ? "Plane Crazy" (shown privately) 
shown in May 1928, or "Steamboat Willie" (which was Mickey's first 
public appearence) shown in October/November 1928 ?

Best wishes,
Mads