The first postcard shows the 1960 Miss Pumpkin Show Queen, Peggy Clark. (If you look closely, a John F. Kennedy campaign poster is visible in the top right corner). The Pumpkin Show website has pictures of Past Miss Pumpkin Show Queens, dating back to 1933.
The second postcard shows "The World's Largest Pumpkin Pie" which is baked annually for the show by Lindsey's Bake Shop.
The back of this postcard gives the following recipe:
80-lb. cooked pumpkin
3-lb. corn starch
1-lb. pumpkin spice
30-lb. pie dough
Bake 6 Hrs. Cool 6 Hrs. and Serve.