Okay, I am officially creeped out. So, I decided to share it with you! Here’s more detail, from: gasmasklexikon:
The Mickey Mouse Gas Mask was produced as part of the war production program. The Sun Rubber Company produced approximately 1,000 Mickey Mouse gas masks and earned an Army-Navy ‘E’ for excellence in wartime production in 1944. Overall, production of the Noncombatant Gas Masks (and in fact, all gas masks) was one of the most successful production programs of the war. In fact, production had to be curtailed early due to the vast quantity produced.
Hat tip: Dark Roasted Blend.
Broke Hoedown 
Yeah I can so see a horror movie were the kid serial killer (the zombie or ghost of a child who died in the 40s or 50s) walks around with that gas mask on the whole time.