OK, here's the first cover I've ever purchased. If you read the Main forum, you know I've bombarded David Giles with questions about collecting U.S. Airmail Postal Stationary (UC in Scott).
So here's the first cover I bought -- and it's not even in the UC category. But I like the way it looks and it was under $2


The slight pink tint is a function of my scanner -- the actual cover is "normal" color.
The envelope is sealed, but inside there is a slip of paper. I believe it is stamped with the name of the postmaster. Should I cut it open and see?
Just kidding

But seriously, was that commonly done?
I realize there's no great value or interest here, so thanks for looking,
KirkS