Mickey Mouse Snow White New Friends litho die cut banners

Description

Three lithograph banners of Mickey Mouse and Snow White.  7" long and 2" wide at the widest spot.  Die cut stiff paper, they look like they were cut out of a cereal box with scissors.  Nothing on them indicates a date but I think they are from the late 30s or early 40s.  They all look the same but have some slight differences.  Top is darker and Mickey's right foot has been taped back on and his ears are cut sort of boxy.  Middle is lighter and has been taped on the back in lower right just under Snow White.  The bottom is creased at the staff of the banner.  Would these be cutouts from Post cereal boxes?