Found one of my old QSL cards from the 1960s in the Rare & Unique Digital Collections at N.C. State University: “QSL Card from WA4NUO, Alexander, N.C., to W4ATC, NC State Student Amateur Radio.” … I attended NC State in the 60s and was a member of the W4ATC ham club. … See here.
QSL cards resemble postcards. Hams exchange them to verify contacts for the purposes of contests, certificates such as WAS (Worked All States), or just for fun.
I think I always like this QSL design best of the several versions I had back in the day. Now, gotta design one for W5VE.