I love a well loved card! Here's a Mayo that was found nailed to a barn beam along with a bunch of other ones and were found in the New England area. Whenever you see a Mayo with a hole like this at the top, you will know it came from this find. I looked through the entire bunch before they went to auction a few years ago.
There's some right now available in an upcoming auction. Keep your eye out for more as you now know their provenance.
jeff