This card, with the "Champagne Tower" is date coded 1955.

I love the little plate in this picture. There's a piece of adhesive tape on the back with the notation "Flamingo, May 1960; Las Vegas, Nevada". I'm assuming it was a souvenir of someones vacation. The menu, from August of 1956, was one of our first menus and it only cost $1 !

I wish I knew how to figure out the date of this one.