I recently acquired a mixed set of Disneyland slides that included a few old Kodachrome's and like a kid I'm posting the best one first!
That sign is great! There is no date marking on these red bordered slides. I think it looks pretty close to 1955.
Today's second slide is a very bright and open Frontierland entrance. No date here either, but it looks warm in this photo, the folks in the Fireman photo above look dressed for winter.
I'll post more from this set soon.