All three of these were probably bought at the Linfield Bookstore by a Linfield 1970 grad while the grad attended Linfield, 1966-1970.The post card has not date, but notice in the upper right hand corner the college's baseball field at its old location before it was moved closer to Maxwell Field. The button shows an interesting version of the Wildcat. The decal is more familiar. A slight variation of it appears on the Linfield football team helmets.