I do not have a year on these postcards as they are not stamped.
I received them around 1980.
They are unused and have been in a holder ever since. There are a couple little dents, on them, but to see them you need to turn them in the light. They are not mint, but very nice.
On the back they read: Kyle Stevens famous Wildlife exhibit. Over 1000 exhibits "free of charge". Downtown Wisconsin Dells. Bring the family.