I found this Disneyland 35th Anniversary Pin Set in one of my boxes that I was cleaning out. It was a Cast Member exclusive. I love that it celebrates the lands of Disneyland. The designs show off a recognizable image or icon as it relates to the themed land. The pins are very flat on the front surface. Remember, this is 1990 and it's just before Disney figured out their "pin" brand.
Here is an image of the back of one of the pins. It reads "Company D at Disneyland" which the name of the Cast Member store.
Disneyland's 35th anniversary was my first big celebration and event that I was able to experience as a Cast Member. I have a lot of great Disneyland memories associated with 1990.