This is the case I got from Gaye's yard sale. She said the person she got it from said it was an old post office training case. The cards that have addresses are smaller than regular envelopes, so it is more of a mini post office.
I also got these mysterious lettering pens from her. Not sure how to use the pens, but the tiny stencil is very cool!!
So I guess now I need to go look for little things to go in the little cubbys.