Between 1957 and 1966, a series of illustrated postcards were published by Angeleno Photo Service (aka Bob Plunkett) of Los Angeles, and they were sold at the Art Corner shop in Disneyland's Tomorrowland. This Snow White card was included in the selection. Copyrighted © Walt Disney Productions. Oversized 5.5" x 7".
Card images and info via the late Ken Eslick's wonderful Disneyland Postcards site.