I have a couple of boxes with hundreds of covers that occasionally on a rainy day I'll poke though.
Every time I go through the box I find something interesting so I thought I'd start a thread with some.
This one is just a plain looking 4th bureau 1¢ so never gave it a 2nd look.

Finally giving it a 2nd look, it looks like a vending machine coil with a strange knife cut?

Then it unfolds to this vibrant almost 100 year old color picture

Then that unfolds into what looks like a cleaning company ad mailer.

Thought it was kind of neat. Find odd things like this every time I go through the box.