It is that old. Back in the mid '70s, there was a weekly PBS TV show on
"Aviation Weather" and they frequently mentioned the "exam-o-grams"
"Marco Leon" wrote in message
...
wrote in message
"Exam-O-Grams are brief and timely explanations of important
aeronautical knowledge items.

Sounds like it's old enough to be from the era of the "Land-O-Matic" and
Royalite. Speaking of Royalite, it looks like it's still available for
aircraft in new designs:
http://www.spartech.com/plastics/aircraft_sheet.html

Marco