I came across these retro vintage letters. The envelopes are folded from magazines, the to and from information are placed at random, as are the stamps. Apparently it was done a lot back then. I'm sure they didn't call it mail art, but that's exactly what I'm going to call it!
Letters are stamped 1971. I'm in awe.
Paperminutes #516 - Weihnachtsmütze / Christmascap
10 hours ago