Not that I can compare to Dan's big score, but I just bought a bunch of signed artist hardcovers (Steranko, Adams, Vess, etc) and vintage Disney paper paraphenalia. Included was this...and I can find zero information about it. It's an original 1937 Snow White World Premiere invitation.
The inside pages are just a sampling...this is probably 20-pages long, with similar local business ads wishing Walt well on his movie and short articles about different aspects of the film. I have a gut feeling it could be something "special" as far as value, but other than e-mailing Heritage I don't know where else to find out.
Peace,
Chip