This is the exact letter that made Gary Halbert a millionaire in 1971.
It was one page, sealed in an envelope, selling them a “Coat of Arms” picture and report based on their last name, and it peaked at making 20,000 sales per day (and these were physical mail orders) 
This particular letter was sent to every “Macdonald” in the phone book across the United States:
For $2.00 (in 1971) this is what was sent back to you:
1.) A coat of arms picture of your family last name, you could then frame it if you liked. Like this (without the frame, it was just sent to you on paper):
2.) A small report explaining the coat of arms: (h/t to @eston_esau for taking this pic of this in his grandpa’s house)!
